Query: popular physics books?

My son (13) is in his physics phase. As a biologist, I don’t know much about physics beyond college classes, but our home library is huge, so he managed to dig out a bunch of physics-related books. Some he read, others he skimmed, and now he wants more. He is interested in everything – gravity, cosmology, etc. He is not afraid of simple math so a book with some easy formulas are fine. Help me pick a couple of good choices to get him later this week. What he checked/read so far is a smorgasbord of books of different ages, qualities, levels and topics:
Atom by Isaac Asimov
Mr.Tompkins Explores the Atom by Gamow
Relativity by Einstein
The Unfinished Universe by Louise Young
The Quark and the Jaguar by Murray Gell-Mann
The Unexpected Universe by Eiseley
Relativity Visualised by Epstein
From Copernicus to Einstein by Reichenbach
Stephen Hawking’s Universe by John Boslough
Encounters with Einstein by Heisenberg
A Briefer History of Time by Stephen Hawking
QED by Feynman
Dreams of a Final Theory by Steven Weinberg
Rainbows, Curve Balls & other wonders of the natural world explained, by Ira Flatow
Broca’s Brain by Sagan
Cosmology Now, edited by Laurie John
Entropy and the Magic Flute by Harold Morowitz
Frontiers of Complexity by Coveney and Highfield
The Trouble with Physics by Lee Smolin
So, give me your suggestions in the comments….