Last week I attended an Agile Mini-Conference (hosted by my company) featuring Martin Fowler and Neal Ford. During the course of the day, there were many books and papers mentioned by both of these Agile luminaries. Below is the list that I compiled.
Books
Smalltalk Best Practice Patterns
Kent Beck, ISBN 013476904X
The Pragmatic Programmer: From Journeyman to Master
Andy Hunt & Dave Thomas, ISBN 020161622X
The Mythical Man-Month: Essays on Software Engineering, Anniversary Edition
Frederick P. Brooks, ISBN 0201835959
The Productive Programmer
Neal Ford, ISBN 0596519788
Pragmatic Thinking and Learning
Andy Hunt, ISBN 1934356050
Essays
No Silver Bullet: Essence and Accidents of Software Engineering
Frederick P. Brooks, Jr.
Code as Design: Three Essays by Jack W. Reeves
Jack W. Reeves