Oghma Infinium
A book that raises all six combat, magic or stealth skills by five levels, read once.
Where to get it
Open the Dwemer lockbox for Septimus Signus at the end of Discerning the Transmundane.
Found in Septimus Signus's Outpost.
Can be missed
Septimus must live until the box is open: killing him early fails the quest.
Quests
- Discerning the Transmundane: Visit Septimus Signus in his ice cave on the sea north of the College of Winterhold. The main quest Elder Knowledge sends you to him as well. Reward: Oghma Infinium.