Gallaher, Jason. Whobert whover : Owl Detective / Jason Gallaher, illustrated by Jess Pauwels. - First edition. - New York : Margaret K. McElderry Books, c2017 - 1 volume (unpaged) : color illustrations; 26 x 29 cm. ISBN: 1481462717 Subjects--Topical Terms: --Owls ----Juvenile fiction.