Crisis on Earth 2!

 I'm a longtime fan of the JUSTICE SOCIETY OF AMERICA (or, "JSA" to their friends), the world's first superhero team and inspiration for the more familiar to a general audience and contemporary JUSTICE LEAGUE OF AMERICA (Zack Snyder fans please hold your comments).

The 1st appearance of the JSA, All-Star Comics #3 (December 1940, DC Comics)

I discovered the JSA via one of the many now classic annual JSA/JLA crossovers that used to be a staple inside the pages of the JUSTICE LEAGUE's book, but my love for the team was really cemented during what I refer to as the "Roy Thomas Era" of the team's lore and canon.  The Thomas-written ALL-STAR SQUADRON, INFINITY INC., and YOUNG ALL-STARS were must-have regular comic book reading material for me as a child and teenager.  A childhood fascination with anything pop culture and media centric that was produced during the 1930s/1940s....comic books, films, classic radio shows, pulp novel reprints...fueled this obsession with superheroes and comics of the era that continues to this day.

All-Star Squadron #1 (September 1981, DC Comics)

Infinity Inc. #1 (March 1984, DC Comics)

Young All-Stars #1 (June 1987, DC Comics)

Now, being a hardcore fan of the property who has a crazy strong completist urge has caused me over the course of my 46 year-long path of comic book fandom to put together a pretty decent JSA collection, owning nearly everything from the earliest Silver Age appearances forward...

The first two JLA/JSA crossovers, JLA #21-22 and #29-30, from 1963 and '64, respectively

Side note:  One of my favorite issues of Silver Age JLA has always been issue #51, which is the conclusion of the introduction of the character of Zatanna.  I've always felt that it was sort of an "almost JSA crossover" due to the Golden Age connection to Zatanna father, Zatara the Magician.  Also, can this storyarc be considered the first multi-title company crossover being that the first four parts of the story are in four other titles (HAWKMAN #4, THE ATOM #19, GREEN LANTERN #42, and DETECTIVE COMICS #355)?

Recently, I completed a run of the Bronze Age incarnation of the JSA's home title, ALL-STAR COMICS, filling a gap I'd had in my collection for years.  In 1975, after about 25 years of being a defunct title, DC Comics decided to relaunch the book continuing it's original numbering and proceeded to keep it in print for another 17 issues.  This run of the title is of interest due to the first appearance of Power Girl (the Earth 2 equivalent of Supergirl) and the establishment of the focus on the team being generational in nature, with an emphasis on legacy.

All-Star Comics #58 (February 1976, DC Comics)

The reason why it took me so long was simply due to me being an old, forgetful man who'd totally forgotten that I didn't own a complete run of the title.  It was a pretty simple task, the only issue that's slightly pricey is issue #58 due to it being the first appearance of the aforementioned Power Girl, decent copies going for around the $125 to $150 range, and the rest can be had for less than 10 bucks apiece, with exception of the last few issues being slightly higher, probably due to the early appearances of the Bat-family tie-n character of the Huntress.