This is a long-shot since I haven’t seen this book since I was a child and my memory is somewhat blurry.
This must have been in the early 2000s, but the book could have been older. The pages were size A4 and the book couldn’t be more than 50 pages. Just a collection of absurd images and the one I remember best is a drawing of a huge watermelon still attached to the plant in the ground. The watermelon had windows and a door with a chimney on top. There was another with a blimp in the sky shaped like a watermelon.
I think there were a few images of a cop on rollerblades chasing a thief on a bike, but that could be another book.
Have been looking for this book for years so any help in the right direction is appreciated.