Emperor's Hand; where we are finally shown what Mara's life was like as an Emperor's Hand, before and after the death of Palpatine.
Thrawn Trilogy; where we see Mara first introduced, hear about her quest, and learn a little bit about the mysterious redheaded woman that wants to kill Luke Skywalker.
Jedi Academy Days; what Mara was doing and where she was as she flitted in and out (mostly out XD) of Luke Skywalker's Jedi academy.
Hand of Thrawn Duology; where we watch romance blossom in the dark caves of Niraun and our favorite couple kick a little clone ass
New Jedi Order; when the Yuuzhan Vong invaded, Mara was there--from the disease to Ben to everything in-between
Dark Nest; where we see what Mara was doing when the strike team disappeared and while those crazy bugs were looking to screw up everyone's lives
Legacy of the Force; where we take a peek into Mara's role in the progression of the Legacy series.