>>150288586

Well, the logical starting point is her solo comic. Not the current one, the original one from 2000. This has been collected partially into some TPBs (there's the old set of five books, the new set of two thick books that replaces some of them, and the new-new DC Finest book that retells the Shiva arc in compressed form). Some of it, including entirety of the Horrocks run, is unavailable outside of back issues or simply pirating them.

After you've gone through 73 issues of her original solo (and her origin story in No Man's Land), you can start with her current solo comic which pretty much continues directly from her 2006 comic, skipping the 20 years between. This is probably a good move since during those 20 years she appeared rarely and was mostly poorly used.

There was an attempt to reboot her as "Orphan" in NU52 that was botched and failed, and before that an incredibly unpopular attempt to turn her into a villain. Avoid those comics. Avoid the shitty BoP movie of course. Some random one-off stories use her okay, my favorite is Justice League Elite miniseries since it's one of the few things outside her own comic that accurately displays her abilities. She guest-stars in some late issues of Red Robin which is fine.