The pizza pie slugger /
by Jean Marzollo ; illustrated by Blanche Sims.
- New York : Random House, c1989.
- 62 p. ill. ; 20 cm.
- A Stepping stone book .
Billy, the former champion slugger for his third grade baseball team, is bothered by his very young stepsister's presence at games and feels that she is jinxing him into a batting slump.