The Isgeri were a collection of at least 11 Kellid tribes that inhabited the land between the Menador Mountains and Five Kings Range of central Avistan. In 2133 AR, the Taldan Seventh Army of Exploration invaded and pacified the tribe, establishing a new protectorate there. They eventually named it Isger as a mark of respect to the courage of the people they had defeated.
- James Jacobs et al. (2011). The Inner Sea World Guide, p. 35. Paizo Publishing, LLC. ISBN 978-1-60125-269-2
- Michael Kortes. (2009). What Lies in Dust. What Lies in Dust, p. 48. Paizo Publishing, LLC. ISBN 978-1-60125-197-8
- Erik Mona et al. (2008). Campaign Setting, p. 82. Paizo Publishing, LLC. ISBN 978-1-60125-112-1