Radiance, by Alyson Noel

From @AlysonNoel, the #1 New York Times bestselling author of the Immortals series comes a new middle-grade series featuring Ever's younger sister, Riley.

Riley has crossed the bridge into the afterlife—a place called Here, where time is always Now. She has picked up life where she left off when she was alive, living with her parents and dog in a nice house in a nice neighborhood. When she's summoned before The Council, she learns that the afterlife isn't just an eternity of leisure. She's been assigned a job, Soul Catcher, and a teacher, Bodhi, a possibly cute, seemingly nerdy boy who's definitely hiding something. They return to earth together for Riley's first assignment, a Radiant Boy who's been haunting a castle in England for centuries. Many Soul Catchers have tried to get him to cross the bridge and failed. But all of that was before he met Riley . . .

Radiance by Alyson Noel
A Paperback Original from Square Fish Books
An Imprint of Macmillan Children's Publishing Group
(From the YouTube description)