Closed Circle
| Copyright Holder | Robert and Vaunda Goddard, Chivers Audiobooks |
| Read by | Bill Wallis |
| Publisher | Chivers Audiobooks, Chivers North America |
| Phonographic Copyright Holder | Chivers Audiobooks |
| Format | Audiobook |
| Language | English |
| Location | UK & US |
| Copyright | 1993 |
| Copyright | 1999 |
| Phonographic Copyright | 1999 |
| Catalog Number | CAB 1833 |
| ISBN | 0 7540 0410 4 |
| Barcode | 9 780754 004103 |
| Notes | X 10 cassettes. |
Added by Supernaut1970