The Linux Philosophy for SysAdmins
David Both
Spark: The Definitive Guide
Matei Zaharia & Bill Chambers
Distributed Systems for practitioners
Dimos Raptis
Why We Sleep: Unlocking the Power of Sleep and Dreams
Matthew Walker
Learning the vi and Vim Editors
Arnold Robbins & Elbert Hannah & Linda Lamb
vi and Vim Editors Pocket Reference
Arnold Robbins