Shinsou Kaimei Dokuhon
Umineko no Naku Koro ni Shinsou Kaimei Douhon (うみねこのなく頃に真相解明読本, When the Seagulls Cry Truth Reader) are a series of guidebooks written by KEIYA and published by Futabasha. Each book goes into detail regarding the individual episodes of Umineko no Naku Koro ni, including fan theories, notes from Ryukishi07, and other materials.
| No. | Title | Release date | ISBN |
|---|---|---|---|
| 01 | Umineko no Naku Koro ni Shinsou Kaimei Dokuhon (うみねこのなく頃に真相解明読本) | November 22, 2007 | ISBN 978-4-575-16468-8 |
| 02 | Umineko no Naku Koro ni Episode 2 Shinsou Kaimei Dokuhon (うみねこのなく頃にEpisode 2真相解明読本) | June 19, 2008 | ISBN 978-4-575-16475-6 |
| 03 | Umineko no Naku Koro ni Episode 3 Shinsou Kaimei Dokuhon (うみねこのなく頃にEpisode 3真相解明読本) | November 25, 2008 | ISBN 978-4-575-16478-7 |
| 04 | Umineko no Naku Koro ni Episode 4 Shinsou Kaimei Dokuhon (うみねこのなく頃にEpisode 4真相解明読本) | April 17, 2009 | ISBN 978-4-575-16481-7 |
| 05 | Umineko no Naku Koro ni Chiru Episode 5 Shinsou Kaimei Dokuhon (うみねこのなく頃に散Episode 5真相解明読本) | November 24, 2009 | ISBN 978-4-575-16483-1 |
| 06 | Umineko no Naku Koro ni Chiru Episode 6 Shinsou Kaimei Dokuhon (うみねこのなく頃に散Episode 6真相解明読本) | April 25, 2010 | ISBN 978-4-575-16485-5 |
| 07 | Umineko no Naku Koro ni Chiru Episode 7 Shinsou Kaimei Dokuhon (うみねこのなく頃に散Episode 7真相解明読本) | December 17, 2010 | ISBN 978-4-575-16486-2 |
| 08 | Umineko no Naku Koro ni Chiru Episode 8 Shinsou Kaimei Dokuhon (うみねこのなく頃に散Episode 8真相解明読本) | June 10, 2011 | ISBN 978-4-575-16487-9 |