I really like Timeless: Diego and the Rangers of the Vastlantic by Armand Baltazar. It is a kind of hybrid book: mostly text, but with some beautiful images. Unusually, the images are integral to the story – they advance the story, rather than just illustrating something in the text.
Here’s what I said in my review on LibraryThing:
In a story of a shattered world, beautiful art and wonderful ideas are seamlessly melded together.
An unusual book design in that the images themselves are narrative – they don’t illustrate events in the text, they tell new parts of the story.
I rated it 5/5.