omega 616 said:
book (as far as I know) is about the bastards
Allow me to point out some non-Space Marine books. I hope you find at least one of them interesting (Only read the first Gaunt's Ghost book myself)
Gaunt's Ghosts: About the Tanith First and Only, the first and only Imperial Guard regiment of Tanith, a planet devastated by Chaos as it was formed. Gaunt, the Comissar in charge of the regiment, gave the order to abandon the planet and save the First and Only, mainly because they didn't stand a chance and hell. Being the only survivors of the planet, they First and Only resent Gaunt, but they're stuck with him. Because they've been folded into the Sabbat World Crusades, a crusade to reclaim a hundred star systems from Chaos. It's a well liked series and heavily inspired by Sharpe.
Ciaphas Cain: Another commissar focused story, with a bigger focus on humor. Two regiments from the ice planet of Valhalla are heavily devastated and the survivors are folded together to compensate for losses. Since one was all male and the other all female, they don't get along that well, so Cain is sent to keep them in line. Funny thing about Cain though. He puts on a brave face, but internally he's shitting his pants at everything he sees and constantly tries to get away from the fighting, only to accidentally blunder into the thick of it. It's constantly questioned whether he's a coward who gets by via sheer luck or if he's more skilled than he gives himself credit for. He did get into a swordfight with a Khorne Berserker and survive long enough for his aide to pop up with his melta-gun.
The Last Chancers: Colonel Schaeffer runs an experimental regiment manned entirely by convicts. If they survive the suicide missions they go on, they receive a full pardon. If they refuse, their sentence is upgraded from life to death.
Plus plenty of others. Eisenhorn follows the Inquisitor the books are named after, and apparently the Tech Priests and Sisters of Battle got some books too.