Working on a book that contains a lot of text? Consider using your favorite word processor to write and format the text. Then, move the text into iPhoto as needed: select the text you need for a given page, and copy it to the Clipboard. Next, switch to iPhoto, click in the destination text box, and paste. iPhoto even retains your formatting.
This approach lets you take advantage of a word processor’s superior editing features, not to mention its Save command—something iPhoto lacks.