Hilaritas Press continues publishing wonderful new editions of many of Bob's books.
The latest one is "email to the universe" - a newly proofread edition, with an added Intro, an Afterword by Paul Krassner, new illustrations, a new cover. Read more about it, or buy the ebook, here.
IMPortant note: Only the Kindle edition is available, at the moment, so any offers of paperback copies you see on Amazon will be the old edition from New Falcon. Best to wait, if you want a paperback copy of this smart new edition from Hilaritas.