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Paperback details (USA). details (UK). details (Germany). details (Canada). ISBN: 978-1-4814-4478-1 ISBN-10: 1-4814-4478-6 |
| See also (possibly by other authors): | ||
| 2015 | Hardcover | Crystal Keepers (Five Kingdoms) |
| 2015 | Audio CD | Crystal Keepers (3) (Five Kingdoms) |