Devotees of Leon Garfield's distinctive way of expressing himself will take pleasure in [The Ghost Downstairs]…. A tale whose meaning dances full circle, it is for any child, teenager, or adult who delights in fantasy. Despite its verve, however, it may grow too fantastical for those not sufficiently enchanted by its style to enter into a willing suspension of disbelief. (p. 13)

Eleanor Cameron, in Book World—Chicago Tribune (© 1972 Postrib Corp.), May 7, 1972.