When a fight breaks out among the members of the Baby-sitters Club, timid Mary Anne finds herself becoming more assertive as a babysitter and in her relationships with her father and friends.

Tyrannosaurus Rex enthusiast Sal transforms herself into an uncontrollable T. Rex, partly because her brother said it would be impossible, but soon discovers the downsides of always being fierce.

"Mr. Yes could do a lot of different, funny things but he'd never learned how to say no. Have you ever smiled and said yes when what you really wanted to say was no? This is a fun story for readers of all ages about the importance of communication and being assertive."--Page [4] of cover.