PRINTED BOOK INCREASED WITH ASSOCIATED ELECTRONIC DATA
BACKGROUND OF THE INVENTION 1. FIELD OF THE INVENTION The present invention relates generally to the field of multimedia publications. More particularly, the invention relates to a printed book, the text of which is augmented with associated electronic data that is stored on a remotely accessible server. 2. PREVIOUS TECHNIQUE As the home computer has matured, there has been a real explosion in "multimedia publications." A vast set of program titles
(Software) is now available to the owner of the computer who combine text, images and sounds to provide a multimedia experience. A wide penetration of CD-ROM drives in home computers has accelerated this process. Multimedia content is also available online, particularly the World Wide Web. The public's enthusiasm for computer-based multimedia experiences is seen by many as a threat to more conventional forms of publications, particularly book publications. However, the reading experience of a book can not be reproduced by electronic means and reading remains a pleasant pastime for a large number of people, whether they are not participating in computer-based entertainment. There have been several approaches to combine computer-based multimedia experiences with a separate printed text. A particular approach is related to training and educational subjects where a printed textbook is provided in combination with the multimedia content stored locally on a hard disk, floppy disk or CD-ROM, or remotely accessible over the Internet. While the multimedia materials and the textbook may be parallel to each other, the reader of the textbook is not provided with graphic signals that direct their attention to electronically stored data associated with the text that is read at the time. The patents of the U.S.A. Nos. 5,597,307 and 5,624,265 issued to Redford et al. Describe a printed publication having associated electronic content. The printed publication contains one or more buttons that trigger a remote control transmitter within the book. A remote control receiver is coupled to the computer system of the reader's home. Upon receipt of a remote control signal, the electronic content associated with the text of the publication is downloaded from a remote server and presents the reader in the home computer system. Apart from pressing the button in the printed publication, the reader does not participate in the interface between the home computer system and the remote server. This necessarily limits the interactivity of the interface. SUMMARY OF THE INVENTION The present invention provides a system and method for increasing printed text with electronically stored data in the form of images, sounds and / or supplementary text. A printed book contains a plurality of pages of text. At least one of the pages is printed with a first graphics signal, such as a symbol or icon. Data associated with the text appearing on that page is preferably stored on a remotely accessible electronic data server. The server can be accessed from a client computer that belongs to the reader of the book. A graphical user interface is provided to control access to data stored on the server. The graphical user interface displays second graphic signals that correlate visually with the first graphic signals. The two graphic signals can be identical or similar enough so that the reader can unequivocally identify a symbol or icon on the computer screen that corresponds to the symbol or icon that appears in the book. The reader designates or manipulates the graphic signals that appear on the computer screen using a computer mouse or similar pointing device. The server then retrieves the data associated with the signals and presents the data to the reader as images, sounds and / or supplementary text on the reader's computer. Alternatively, the reader may be presented with a menu or other secondary user graphical interface to select images, sounds and / or text for presentation. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 illustrates a printed book according to the present invention. Figure 2 illustrates a graphical user interface for retrieving text-related data according to the present invention. DETAILED DESCRIPTION OF THE INVENTION In the following description, for purposes of explanation and not limitation, specific details are set forth to provide a complete understanding of the present invention. However, it will be clear to one skilled in the art that the present invention can be practiced in other embodiments that depart from these specific details. In other cases, detailed descriptions of well-known methods and devices are omitted so as not to block the description of the present invention in unnecessary detail. Figure 1 shows a book 10 printed according to the present invention. Book 10 is essentially like an ordinary book, with a plurality of pages 12 containing printed text. Book 10 can be a work of fiction or non-fiction. The subject matter of the book 10 is not particularly pertinent to the present invention, it is understood that the invention can advantageously be applied virtually to any type of book. In addition to the normal printed text, the book 10 is printed with graphic signals 14 on at least one of the pages 12. The signals 14 appear in the immediate vicinity of text for which electronically stored data available for recovery are associated by the reader of the text. book. The signals 14 can take many forms. For example, it may be a symbol or icon that appears on or near the page margin. The symbol or icon may be thematically related to the subject of the book, but this is not necessarily the case. An example of such a thematic relationship would be the use of a compass in a book related to exploration. If the signals 14 appear on several pages of book 10, each appearance of the signals may be the same or slightly different. For example, a compass could be used with a pointer pointing in a different direction for each occurrence of the signal. This can then be used to direct the reader to the appropriate electronically saved data as explained below. The signals 14 can be integrated with the text of the book. For example, one or more words in the text or the page number may be printed in bold or in a contrasting type or font. It is only necessary that the signals 14 be clear to the reader of book 10, but preferably they are of a nature that will not cause the reader undue distraction. As indicated above, the signals 14 provide a visual indication to the reader that there are electronically stored data associated with the text in the vicinity of the signals. These data may be in the form of images, sounds, and / or supplementary text. Image data may include maps or photographs showing sites referred to in the text, photographs or illustrations of characters referred to in the text, etc. Sound data may include text narrations, sound effects associated with events illustrated in the text, music for mood, etc. Supplementary text data may include "sidebars" referring to the text, alternate accounts of events illustrated in the text, complete accounts of a condensed text, etc. Certain types of supplementary text data are unique to the present invention. An example is a synopsis "on the fly". At various points throughout the printed text, the reader can be invited to obtain an electronically stored synopsis of the story told up to that point. No information is disclosed about events beyond the page where the reader accesses the electronically stored data. The synopsis can include the list of characters entered so far, a chronology of events or several other summaries. It is not required to invite the reader with graphic signals to use this feature. The electronically stored synopsis can be arranged to be accessed at any corresponding point within the printed text. This can be achieved simply by supplying the page number of the printed text that follows an appropriate signal at the user's interface. Next with reference to Figure 2, the supplementary text, sound and / or data data associated with portions of the text in the book 10 are stored in a data storage device such as the remote data server 20.; however, the invention is not limited in this respect. The data storage device may be local to the customer's computer in the form of a hard disk, floppy disk, CD-ROM or other data storage medium. In the currently preferred mode using the remote data server 20, remote access to the server is preferably provided via the World Wide Web. A client computer 30 belonging to the book reader 10 comprises a processing unit 32, display 34, keyboard 36 and an equivalent pointing device or mouse 38. In order to access the data stored in the server 20, the reader must first register with the server. server. This is accomplished in a conventional manner, but may require validation to ensure that the registrant possesses a copy of book 10. This validation can be accomplished, for example, by providing the serial number of book 10. Once the reader it has been successfully registered, a graphical user interface is presented in the display 34. This interface is preferably constructed as a network page using conventional programming techniques. A variety of network pages, each associated with a particular book title, is preferably provided by the server 20. The network page for the book 10 includes graphical signals 40 which are visually correlated with the graphic signals 14 appearing in the book 10. To retrieve the data associated with the text in the vicinity of the signals 14, the reader uses the pointing device 38 to select the signals 40. This selection can be achieved by "clicking with the mouse button" on the signals 40, and may include or may be followed by manipulation of the signals as described below. The actions of the reader with respect to the signals 40 are communicated to the server 20 which retrieves the associated data and transmits them to the processing unit 32. The data is presented to the reader by the computer system 30 in the form of images, sounds and / or supplementary text. It is not necessary that the signals 40 be identical to the signals 14, as long as there is sufficient visual correlation between the two so that the reader unambiguously selects the appropriate signals. If all appearance of the signals in book 10 is a single symbol or icon, corresponding symbols or icons are provided on the Network Page. Alternatively, a normally structured symbol or icon may be used throughout book 10. In this case, the network page would be constructed so that the signals 40 direct the reader to additional selection options. For example, if the signals 14 are in the form of a compass, each appearance of the signals 14 in the book 10 may have a pointer pointed in a different direction. The reader will then select the signals 40 on the network page and, using pointing device 38, will rotate the indicator to the appropriate orientation. Alternatively, the signals 40 may have a "drop down" menu of several page numbers corresponding to the page numbers in the book 10 in which the signals 14 appear. It will be recognized that the above described invention can be incorporated into other specific forms without departing from the spirit or essential characteristics of the description. Thus, it is understood that the invention will not be limited by the preceding illustrative details, but will be defined by the appended claims.