Willis

 By James Marshall

I'm making a point of collecting all of the James Marshall that I can.  They can be difficult to find in the library, and when I was younger, we used to repeatedly take them out, anyway.

 Most of Marshall's books have several sequels, but Willis is a one-off.

It's still completely brilliant.  Great characters, ridiculous circumstances, and everything magically comes together in the end.

The story is told more in text than picture, which is unusual for Marshall, but it's still absurd and charming.