The captivating middle-grade fantasy-adventure trilogy concludes as Arlo and his magically gifted scouting troop face their biggest challenge yet.

"A thrilling adventure full of magic and wonder." —Ransom Riggs, #1 New York Times–bestselling author of Miss Peregrine's Home for Peculiar Children

After a harrowing summer camp, Arlo Finch is back in Pine Mountain, Colorado, preparing to face a new school, new threats, and two new Rangers in Blue Patrol.

Arlo is about to undertake his most dangerous journey yet: all the way to China to try to bring his father home.

But when the mysterious Eldritch reveal their true agenda, Arlo must make an impossible choice: save his friends and family, or save the Long Woods. Both worlds will never be the same.