Green Lantern: Hal Jordan collects both Green Lantern: Emerald Dawn mini-series. So I'm not quite sure why the title isn't Green Lantern: Emerald Dawn, but whatever. Emerald Dawn and Emerald Dawn II were mini-series that came out in between Green Lantern having a regular series. Maybe this was the Green Lantern: Rebirth of the time.
In a nutshell, these mini-series retell the origin of Hal Jordan. And take a bunch of liberties. Most of the liberties I don't believe are canon any longer. Hal was responsible for the death of one of his friends and ended up going to prison for it. I really don't recall that being part of his history any longer. The first series deals with him becoming Green Lantern, the second series is his first encounter with Sinestro. Honestly, both series aren't all that great, nor are they all that memorable. It was an attempt by DC to bring Green Lantern back to the forefront. It did result in him getting his own book again, but that series ultimately led to his death. A volume collecting the first year or so of that series was solicited by DC, but cancelled shortly thereafter because the writer, Gerard Jones, was arrested on child pornography charges. The timing was unfortunate. I'm sure the book will be re-solicited somewhere down the road, but for now, this volume will be all of that era of Green Lantern in print.
Green Lantern: Hal Jordan
Writer: Gerard Jones, Keith Giffen, Jim Owsley
Artist: M.D. Bright, Keith Giffen, Romeo Tanghal