This first volume is a cute and snappy introduction to the series, its characters, and the worlds they inhabit. The girls are still a bit of a mess as they try to get a grip on this new situation, but it's fun watching them try out their powers in ways that feel pretty realistic to what kids would likely use them for. W.I.T.C.H. is a magical girl fantasy about magic and friendship, so the first book being called The Power of Friendship really sets the stage for what's to come.