Best/Favorite app to create photo books right from your ios device?

[nycadam]

I use an app called mosaic which is fantastic for creating a small, funky bound book of 20 or so photos of your choosing - I am looking to make a larger size, quality book with more than the standard 20-30 photographs.

What is your favorite app to create photo books right on your device and why? I appreciate the look, thanks.
-NYCAdam