A new textbook, Topographic Laser Ranging and Scanning, co-edited by Jie Shan and Charles K Toth is now available. It is apparently the first textbook to tackle the topic of topographic LiDAR technology and processing. Book summary:
This volume provides the first systematic, yet in-depth, introduction to the basic theories and principles of LiDAR (Light Detection and Ranging) technology and data processing, which over the past decade has been successfully used for topographic mapping and 3-D visualization. The information collected in these pages meets the needs of all those working across the many fields LiDAR is impacting, including electrical engineering, signal processing, navigation theory, pattern recognition, and machine learning. Edited by leading experts with broad backgrounds in LiDAR topographic mapping and written by highly regarded specialists, it expands the toolboxes of researchers with novel ideas beyond their own experience.
I don't have a copy of the book, but based on the Google Books preview it seems like it could be an excellent resource for people trying to get up to speed on LiDAR topography.