Abstract: The invention provides an indexed reference book for rapidly locating words or material arranged in an alphabetical order in the pages of the book comprising a front cover having a plurality of vertical and horizontal lines creating an array of index zones forming rows and columns, each of the index zones bearing indicia corresponding to indicia appearing on different pages of the book, the fore-edge of the pages of the book being marked by tab means, the tab means being arranged along the fore-edge of the book in rows and columns, whereby the tab means of a page bearing specific indicia corresponds in its horizontal positioning on its fore-edge of the book to the index zone bearing the indicica, and the number of tabs in each row corresponds to the number of zones in the same row.