Haddix, Margaret Peterson.

Greystone Secrets #1: The strangers / Margaret Peterson Haddix ; art by Anne Lambelet. - First edition. - 405 pages : illustrations ; 22 cm. - Greystone secrets ; 1. .

Told from separate viewpoints, Chess, Emma, and Finn Greystone, ages twelve, ten, and eight, investigate why their mother went missing and uncover their ties to an alternate world.

ISBN: 9780062838377 (hardback) 0062838377

LCCN: 2018013963

Subjects--Topical Terms:
Missing persons
Brothers and sisters
Family life
Secrets
Supernatural