13 books • 4 series
Book #7: Above and Beyond
Book #8: Some Gave All
Book #2: The Ragged Irregulars
Book #3: The Rookie
Book #4: A Wing and a Prayer
Book #5: Maximum Effort
Book #6: The Dogs of War
Book #1: The Children's Crusade
Book #1: It's a Mystery, Volume 1
Book #2: It's a Mystery, Volume 2
Book #3: It's A Mystery, Volume 3
Book #4: It's A Mystery, Volume 4
Book #5: It's A Mystery