Boys and puberty, any book recommendations?

[Memoo]

Ds is 10 although we talk about puberty I'd really like a book for him that might answer other questions he might have. For dd we had a book that she could fill in and she found that really helpful but can't seem to find anything similar for ds.

My son (just turned 12) loved this book - I found it about a year ago and tried to give it to him to read then but it clearly wasn't the right time and he just grunted at me, but I gave it to him recently and he devoured it.

Willies: a user's guide. Zep & Helene Bruller - Piccadilly Press

The user's guide to the willy is a bit old for 10 imo (having just got it from amazon for 10yoDS and decided to put it away for a while as it goes into chlamydia in far tooo much depth)
Theres an Usborne one "What's happening to me?" (the boy version) which DS has really taken to. It's a 'brand' he seems used to from school, and the text is a fairly easy read, which is important when they're thinking through new things. Highly recommended for yr5 and above.

The usbourne book is great