Since this spring when I sold the last print copies, Modern IDL has been available as PDF only. I have not wanted to make another print run because of the large up front investment required, but I have finally explored the on demand printing services that have been around for awhile. I am happy to announce that a print version of Modern IDL is now available on Lulu.com.
The new version is perfect bound, not spiral bound like the old print version. Also, new features of IDL 8.5 have been included in this new print version and the PDF (still available on the Modern IDL website).
If you purchased the Modern IDL PDF in the past and have not received a link to the new version, please let me know.