The Colorado curveball /
by David A. Kelly ; illustrated by Mark Meyers.
- 99 pages : illustrations ; 20 cm.
- Ballpark mysteries ; 16. .
- Kelly, David A. 1964- (David Andrew), Ballpark mysteries ; 16. .
"A Stepping Stone book."
Cousins Mike and Kate investigate after someone threatens to tamper with the scoreboard right before the Colorado Rockies' season opener.