The late 90s and early 2000s went through a very weird period where a slew of occult, mostly Wicca/witchcraft-themed books aimed at teenage girls came out. Most of them were ~real~ magic, some made vague stabs at actual Wiccan practices, and almost all of them were pure 90s camp. Circle of Three looks vaguely familiar - possibly listed in a much-paged listing of books available through the Scholastic book fair at school - and have the same terrifically dramatic covers that bring nostalgic delight to anyone who read Animorphs or T*Witches growing up.
So Mote It Be is one of the ones that actually made an actual go at Wicca, which is appropriate considering the author's background. The story follows Kate, an athletic, popular girl who finds a book of actual witchcraft through her school library. She tries one of the spells to attract her crush to ask her out - and it works! But things start backfiring in strangely anti-climatic ways and so she seeks out two others at the school who checked out the book: Annie, the straight-laced nerdy one and Cooper, the rebellious one. Together they band together to try and undo the spell before it backfires even more, and in the process, learn about each other and Wicca.
The characterization is weak. When I say "Cooper, the rebellious one" and "Kate, the athletic popular one", this is because that's pretty much all there is to their characters. Cooper at least has some vague leanings toward a sarcastic nature, but Kate has all the emotional depth of a teaspoon. Annie is bland and in the background most of the time, only appearing when Kate needs an actual brain cell to figure something out.
The magic isn't exactly ambiguous either. Most books of this genre either commit fully to magic is totally real and does amazing things or the subtle could be magic/could be coincidence. This book can't really make up its mind. On the one hand, it's pretty clearly spelled out (sorry for the pun) later in the series that Wicca isn't a magic wand and money isn't going to appear out of the sky, but then the love spell that goes awry has every boy in school campaigning to be Mr. Kate Morgan.
The writing is about typical for a fluffy book aimed at the 13-15 year old crowd, leaning toward bad (laughed meanly, really?) but mostly harmless.
Overall, this is typical of the period, and that's probably why I love it so much. This review has told you about the two-dimensional characters, the wild swinging between faith and magic-wand-waving, and the writing being about on par with the teeny-bopper crowd, and yet, it's exactly that which makes it so damn good. For those who remember those Scholastic book fairs fondly, for those who watched Charmed when their mom wasn't around, So Mote It Be will find a fond place in their hearts for all its campy, cheesy, Wiccan goodness.