Erwin Puts announced today on his blog that the new version of the Leica Lens Compendium book will be coming soon:
"My new version of the Leica Lens Compendium is almost ready. The first introductory chapter can be downloaded free in the download area. The book covers the history of the company from 1849 to 2010 and focuses on cameras from the Ur-Leica to the S2 and M9 and all lenses from the original Elmax to the most recent M lens. The focus is on the rangefinder lineage.
The printed version will be a one time only print run on subscription only. Details will be give later."