I loved the cover of book #33 The Illusion. Probably my favourite.
One thing I find weird, is that all the book cover morphs stayed the same here in the UK as they were in the US - except #5 The Predator. The backgrounds are different, but the morphs themselves are the same, except for #5. In the US, Marco morphs the gorilla, but in the UK, Marco morphs a lobster. I don't know why that was changed when none of the others were.