Children of the Inquisition is a (very) old book for Vampire: the Masquerade. It’s a “coffee table” book, like the related Kindred Most Wanted book, and lists a number of famous kindred (as per the book’s subtitle “Who’s Who Among Vampires”). It’s a statless book, so you get art and the stories of the various vampires, but nothing related to game mechanics.
It’s an interesting read if you’re into old WoD backstory, though you need to be aware that many of the vampires here have gotten new and revised treatments in later books in the game line. It’s also fun to read as backstory on many of the vampires appearing in VTES: Tyler, Karsh, Vasantasena, Rafael de Corazon, Gratiano, Lambach, Etrius, Durga Syn, Jalan-Aajav and Dominique are all described here.
As noted, it’s meant as a “coffee table book”: lots of art, unusually large page format. I think this book and the KMW book were the only ones White Wolf published in this format, but not totally sure.