Sergey

Level 5 of the Dungeon
(0, 0, D:5)
  a +0 leather armour

Level 6 of the Dungeon
(19, -12, D:6)
  a +0 mace
(22, -17, D:6)
  a manual of Conjurations

Level 7 of the Dungeon
[Shop] Sevoero's Book Boutique
  (Shop contents are unknown)