It's a blog! Mainly of book reviews.
This is an excellent introduction to modern art that prominently features one or more types of visual illusion. A wide range of artists and techniques are show-cased. There is an introduction to each artist featuring some biographical information and discussion of the artist's motivations and techniques but really the images themselves are centre stage in this book.
If you like M.C. Escher or any of those figure-ground illusions like the two faces/single vase you have a good chance of liking a lot of the material here. The paperback is also pretty cheap for a decent full-size art book - not much more expensive than a paperback novel and less than most hardback novels.
I was previously unfamiliar with all but two of the artists presented and I would be interested in seeing more by several of them, so the "Further Reading" section will come in handy.