Anything by Stackpole is an amazing read. All the other authors did great jobs too of course but Stackpole's books seem to stand out. He of course did the Warrior and Blood of Kerensky trilogies as well as some other battletech books.
If you are really gungho about reading then you can also pick up the Twilight of the Clans series...it's eight books long and by several different authors but tells the story of how the IS fought back against the clans post Tukayyid....has a bittersweet ending though.
And stay away from anything that says "MechWarrior: Dark Ages" those are crap and take place in the 3100's.
Edited by Azalie, 09 June 2012 - 11:18 AM.