Solr in Action
Trey Grainger & Timothy Potter
Hacking VoIP: Protocols, Attacks, and Countermeasures
Himanshu Dwivedi
PMP® Exam Practice Test and Study Guide, Ninth Edition
J. Leroy Ward, Pmp, Pgmp & Ginger Levin
Git Essentials
Ferdinando Santacroce
The Art of Assembly Language
Randall Hyde