Bo Smolka has written a dozen sports books catering to kids. 
NFL Up Close: The Baltimore Ravens
NFL Up Close: The Washington Redskins
The Story of the Negro Leagues
The Negro Leagues Integration Era
12 Reasons to Love the Baltimore Orioles
12 Reasons to Love the Washington Nationals
Best MLB Catchers of All Time
Best MLB Outfielders of All Time
Jackie Robinson Breaks The Color Barrier
Best Sport Ever: Baseball
Girls Play To Win: Lacrosse
Miami Marlins