Not a 300+ page book, but totally appropriate for a 10 yo, the baseball card series by Dan Gutman; honus + me, Jackie + Me, Shoeless Joe + Me, Abner + me, Mickey + Me, Babe + Me,
Other books that the oldest read included:
The Daring Book for Boys - loved it plus all the manuals that go along with it.
Don't forget the classics:
Huckleberry Finn and Tom Sawyer
He's currently reading The Red Badge of Courage. He's supposed to read 20 pages a night as part of his homework. He's had to fudge his reports as he likes it so much he read a 178 pages the first night (oops).
He also liked:
Al Capone Does my Shirts by Choldenko
Really, anything Newberry Honor or Newberry Medal will be good. Just go to the library and ask to see the list for that age group or search Newberry on
Amazon. There are so many great books on that list for that age group:
A Wrinkle in Time
The Phantom Toll Booth
The Witch of Blackbird Pond
Island of the Blue Dolphins
Johnny Tremaine
Across Five Aprils
All are excellent books. I have to admit Island of the Blue dolphins and the Witch of Blackbird Pond were two of my favorites when I was that age.