The first three titles in this bestselling series.

It's a Twin Thing
Mary-Kate and Ashley may be sisters, but they are totally different people. But they do agree on one thing: they're way too old for a babysitter! Too bad their dad doesn't see it that way. Now they need a plan - a plan to ban all babysitters forever!

How to Flunk your First Date
Ashley thinks Mary-Kate's new maths tutor is totally cute. But Mary-Kate only cares about the fact that she's missing her basketball practce. So they decide to swap places...

The Sleepover Secret
Ashley's having a sleepover, and has invited the most popular girl at school! But all attention switches to Mary-Kate when she tells everyone a secret she's never even told Ashley...