I made this one....
Fairly simple design. Rectangle cake, put Chocopan Fondant or brown fondant cut to pan size for the back cover and laid it on my cake drum. Add your cake already covered in BC which is also on another thin cake board cut to the exact size of the cake so the board doesn't show. Add white fondant on three sides the two short and one long edge for pages. Use the Wilton wheel and a ruler to get the lines to indicate "pages".
Add front cover and back binding as one piece at the same time. Cut that piece slightly bigger then the cake to help it look like a cover. (I used BC to give it the puffy binding look before adding the fondant.) I also used a dowel laid across the book from top to bottom to give it an indent to help define binding.
I added letters and decorations and hand painted with gold luster dust. Then added a white and red string type piece on the binding for binding stitching. Also one ribbon which I made an slice in the pages with a knife and push it in.
Walla, one book cake. HTH