Guardians of Childhood, book 3: Toothiana : Queen of the Tooth Fairy Armies
William Joyce2012

Beware a tooth fairy queen scorned in this, the third chapter book of Academy-Award winner William Joyce's The Guardians series.
Now that the back story of Nicholas St. North has been told, and the mysteries of E. Aster Bunnymund have been revealed, it's only fair that our journey continue with one of the most riveting, mysterious heroes of all time: Toothiana, Queen of the Tooth Fairy Armies.
Do you want in on a few of her secrets now? Well--she can turn herself into a multitude of selves, all depending on nightly teeth-placed-under-pillows rates. And her diminutive size is not at all indicative of how fierce a warrior she can be. Be forewarned: if you get in between her and a tooth-covering pillow, there'll be Spell to pay.

Titre original : Guardians of Childhood, book 3: Toothiana : Queen of the Tooth Fairy Armies (2012)