I remember being obsessed with The Spirit when Harvey Comics published two issues of reprints back in the mid '60s, bringing the stories out of retirement for a new generation. Seeing those and the one reprint story in Jules Feiffer's book, also of the mid '60s, made me crazy to want to see more. Well, of course nowadays all the Spirit stories have been reprinted in DC's archive series—yay.
Back in the '70s, Kitchen Sink Enterprises brought the Spirit further out of retirement and into an "Adults Only" version, which was only very mildly spicy. I bought those at a headshop as beat up dog-eared copies. Then one day in the '80s there appeared a notice somewhere that Eisner was selling file copies of his later comics. I sent in an order for the underground issues along with a praising letter to Eisner. I received back mint condition copies, autographed on the inside, and a personal thank you note from Eisner himself.
Never be afraid to let your heroes know that you appreciate them!
© 1973 Will Eisner
© 1972 Will Eisner