Star Wars novels. Old Republic

"Tassaa Bareesh, a matriarch in the Hutt crime cartel, is holding an auction that's drawing attention from across the galaxy. Representatives of both the Republic and the Sith Empire are present, along with a Jedi Padawan sent to investigate, a disenfranchised trooper drummed out of the Republic's elite Blackstar Squad, and a mysterious Mandalorian with a private agenda. But the Republic's envoy is not what he seems, the Empire's delegate is a ruthless...

Revan, a former Jedi whose memories have been erased, believes that he somehow stumbled on a secret that threatens the existence of the Republic and must try to stop it, even though he no longer knows what it is.