| The Secret of the Key: a Sixty-Eight Rooms Adventure | | | Author:
| Malone, Marianne | | Read by:
| Campbell, Cassandra | | Series title: | The Sixty-Eight Rooms Adventures Ser. | | ISBN: | 978-0-553-39719-2 | | Publication Date: | Jul 2014 | | Publisher: | Penguin Random House Audio Publishing Group
| | Imprint: | Listening Library (Audio) | | Book Format: | CD-Audio | | List Price: | USD $40.00 | Book Description:
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