The Fairy Squad Princesses

Note this is the 2nd edition! In this epic conclusion of this magical five-part series, Serena, Max, and their friends will be tested beyond anything they could have imagined. Their toughest threat has finally surfaced, and the Dark Siren and her minions: a demonic jester, three kitsuné siblings, and six harpy sisters aren't wasting any time in trying to collect as many Soul Diamonds as they can. The right amount of Soul Diamonds will unleash a power that is far greater than anyone could imagine. This power could even alter time as they know it.
A thank-you letter from the author:
Dear Squad Fairies,
Thank you for being a part of this magical journey. It truly means a lot that you stuck with me from the beginning of the series until the last book. Though this is the end of the book series, this doesn't mean it has to be the end of the Fairy Squad Princesses. You can reread the books, wear the merchandise, and help gain new Squad Fairies by spreading the word about this magical girl book series. Also, who knows in the future the Fairy Squad Princesses could be transformed into the next animated TV series. Imagine the Fairy Squad Princesses streaming on Disney+, Netflix, Hulu, or Crunchyroll. Hmm... why not on all four?
- Stay Magical