Here be Monsters, a Ratbridge Chronicle by Alan Snow. Lots of pictures, an entire goofy world, that, to me, was interesting despite it's goofiness. Get on Amazon and click to look inside to see more pictures and get more of a feel of this (rather fat) book.
The next is the first of a really good series called The Hollow Kingdom Trilogy by Clare B. Dunkle. This is pure YA fantasy with lovely romance and very nice writing and even a kidnapping—a romantic kidnapping, no less, but without any bodice ripping. And of course, there are monsters though many of them are the human kind.