| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2002 | 978-0-9723936-0-7 | Galadriel Waters | Ultimate Unofficial Guide to the Mysteries of Harry Potter |
| 2015 | 978-0-9723936-1-4 | '' | Ultimate Unofficial Guide to the Mysteries of Harry Potter (Analysis of Books 1-4) |
| 2003 | 978-0-9723936-2-1 | Galadriel Waters · Astre Mithrandir · E.L. Fossa | New Clues to Harry Potter Book 5: Hints from the Ultimate Unofficial Guide to the Mysteries of Harry Potter |
| 2015 | 978-0-9723936-3-8 | Galadriel Waters · Melissa Rogers · Michelle Heran | The Plot Thickens... Harry Potter Investigated by Fans for Fans |
| 2005 | 978-0-9723936-4-5 | Astre Mithrandir · E. L. Fossa · Galadriel Waters | Ultimate Unofficial Guide to the Mysteries of Harry Potter (Analysis of Book 5) |
| 2015 | 978-0-9723936-6-9 | First Last | UNOFICIAL GUIDE TO HARRY POTTER BK 6 |