I presume you are talking about the old ones. I've purchased the last several as ebooks already. In fact I pre-ordered the most recent 29th and it was delivered a few weeks ago.
It would definitely be nice to have the entire series as ebooks!
Some amazing stories in those! (some sh*t too.
)
P.S. I also have his "Best of the Best" as ebooks already as well.
I have probably half of them as pbooks, but not the first ones and am missing one here there over the years.