This is a list of some of the books I have read and highly recommend. I have grouped them loosely by category but they are generally in no particular order. Read the Amazon reviews to figure out where to start… they’re all great books!
Lean and Kanban – Basic Reading
The Toyota Way (Liker)
Lean Software Development (Poppendieck)
Implementing Lean Software Development (Poppendieck)
Lean Thinking (Womack & Jones)
The Toyota Production System (Ohno)
Lean and Kanban – further reading
Creating a Lean Culture (Mann)
Managing the Design Factory (Reinertsen)
Freedom from Command and Control (Seddon)
The New Economics (Deming)
Learning to See (Rother & Shook)
Scrum and Agile – Basic Reading
Agile Project Management with Scrum (Schwaber)
Agile Estimating and Planning (Cohn)
Agile Software Development, 2nd edition (Cockburn)
Scrum and XP from the trenches (Kniberg)
Note: this is a free e-book that you can download from InfoQ (registration required)
User Stories Applied (Cohn)
Extreme Programming Explained, 2nd edition (Beck)
Scrum and Agile – further reading and topic-specific reading
Agile Retrospectives (Derby & Larsen)
Fearless Change (Manns & Rising)
Agile Coaching (Davies & Sedley)
Agile Testing (Crispin & Gregory)
Note: I have not yet fully read this book, but I own it, have browsed and read selected parts, and already recommend it.