Chess puzzle book

Hi all,
I am looking for a good puzzle book for my kid, which he can solve in his spare time. He has 2000+ tactics trainer rating and on chesskid.com has 2600+ rating.

If you know any good puzzle book fit for his level, please do suggest. Thanks in anticipation.

Best Regards,
Ashish

3500+ tactical puzzles is good for him

I am sorry cant find any book with title '3500+ tactical puzzles'. Hope you were not telling how many more puzzles to do. To be clear, I am specifically looking for a puzzle book, appropriate for his level.

Thanks!

There's Polgar's "5334 Problems, Combinations and Games" which the Polgar sisters trained on as kids.

It's a substantial book. Builds muscles too!

"Chess Middlegames" by Laszlo Polgar

"Chess Endgames" by Laszlo Polgar

"Encyclopedia Of Chess Combinations" (Chess Informant)

Thanks ipcress12 and Murgen for your valuable suggestion. I will get, whichever I can find and get the kid started on it.

Thanks!