Ethereal Entities Vol. 2

What we know

Full title: Ethereal Entities, Denizens of the Unseen Realm, Volume 2 by Mordenkainen (Session 13 @ 03:13:46)
Found in chest at Khazan's Wizard Tower (Session 13 @ 03:13:46)
Victor Vallakovich requested volume 2 from tower for Stella ethereal research (Session 12 @ 01:26:01)
Party held for review before handing to Victor (Session 14 @ 02:28:48)
Given to Victor Vallakovich at Vallakovich Manor attic—spell needed to bring Stella Wachter back from ethereal plane (Session 19 @ 01:04:36)
Sildir briefly reclaimed it on leaving manor (Session 19 @ 01:21:49)
Victor had it again for ritual prep—further reading from the retrieved tome (Session 21 @ 01:35:09)

Supports Victor Vallakovich's midnight Stella ritual at full moon (Session 21 @ 01:39:02)