My Selection of the Best Books on UX Research, UX Design, Mobile, Accessibility & more by Stephanie Walter
Debbie Levitt's book 'Customers Know You Suck' is a manual for improving customer centricity and selling UX research.
Erika Hall's 'Just Enough Research' is an introduction to user research methods.
Leah Buley's 'The User Experience Team of One' is a survival guide for researchers and designers.