Originally Posted by HarryT
Short in terms of books (only 7), but quite long in terms of time (26 years).
Even shorter originally, as the heart of the series as conceived was just the Kim Kinnison arc. Triplanetary wasn't part of the concept at first, First Lensman was a prequel patch to tie it in, and Vortex Blaster is more of a spinoff.
I fondly hope that if the series ever comes to TV (or movies) they start with GALACTIC PATROL.
(For TV, they can do occasional "Times Past" flashbacks for the Virgil Samms era.)