A friend recommended this book for improving interviewing techniques and for learning how to ask better questions. It is written by former CIA officers, contains good information on detecting deception, what questions to ask, and how to ask them. All of the examples in the book are from real-world situations and are relevant and entertaining.
Written by the head of Google's People Operations. One of the best books I have read on company culture and hiring practices with a lot of practical and actionable advice included.