You know, when I read Serafina and the Splintered Heart, I thought it was the final book in a trilogy. Lo and behold, a fourth book came out last year! Very good news, since this is one of the best MG suspense serieses I’ve read. Catwings is a very short story about a litter of kittens who are born with wings. And The Grimjinx Rebellion is the final book in Farrey’s Vengekeep Prophecies, which ranks high among my all-time favorite middle grade trilogies.