The original book was followed by four sequels: The Return of the Indian (1985); The Secret of the Indian (1989); The Mystery of the Cupboard (1993); and The Key to the Indian (1998). All were published by Doubleday Books in hardcover, then by Avon Books, now HarperCollins, in paperback. There have been multiple reprints in various formats, including movie tie-in editions. The publisher recommended reading level is age nine and up.
