The Secret Keepers by Trenton Lee Stewart

There are enough hidden tunnels, concealed traps, and enigmatic secrets, hair-raising surprises, quirky characters, and ethical dilemmas to keep the plot buzzing. Fans of the Mysterious Benedict Society series will welcome Stewart’s latest puzzling adventure, whose seemingly ordinary hero [11-year-old Reuben] proves quite extraordinary. Grades 5 and up. —Kirkus