>>11123069There's A Punisher Omnibus that collects all of his early appearances prior to getting an on-going series(you could also do Essential Punisher Vol 1 if you don't mind black and white art). After that you want, The Punisher Epic Collection vol 2 Circle of Blood. That contains his first 5 part mini-series and the first 10 issues of his book, along with the graphic novel, Assassin's Guild, where he kills Lupin III. His on-going starts getting really good by issue by the time he has a run-in with Daredevil over the fate of a serial killer *spoiler* Daredevil let's the killer get a slap on the wrist, and in a waaaaay later issue it says, the killer walks and goes free *spolier*