Can anyone recommend a really *funny* book for a 9/10 year old boy?

[GarlicBroccolini]

Currently working our way through the Roald Dahl collection but they’re not loving it as much as expected.

Can anyone recommend a really funny story book?

Anthony Horrowitz, particularly the Diamond Brothers books.
David Baddiel has got 9yo DS giggling.
Not laugh out loud all the time but Magnus Chase by Rick Riordan has some good funny bits.
Have you tried your DTs on Asterix? DS prefers graphic novels and he loves Asterix.

DD is 9 & finds Loki: A Bad Gods Guide to being Good very funny.

Anything by Pamela butchart

Me Gumm so silly, struggled to read them to my boys as laughed so much

The dog man books by dav pilkey