Presumed dead at the end of "Wedge's Gamble", Corran Horn is actually imprisoned in the infamous Lusankya, being tortured and indoctrinated by Ysanne Isard so that he can potentially become a weapon against the Rebellion. Meanwhile, Rogue Squadron and the rest of the Rebel Alliance believe that Tycho Celchu is his murderer. While the investigation and trial take place, Rogue Squadron and the Alliance are dealing with the trap Isard had laid on Coruscant, which could destroy the Alliance from within by setting aliens against humans. Through all of this, Corran Horn is attempting to escape from Lusankya.
"The Krytos Trap" is the third book in the X-Wing series. Michael Stackpole has done an excellent job in creating characters (especially Corran Horn) who are as compelling as any we saw in the Original Trilogy. Here, Horn learns his family history and truth about Lusankya. There's less action than in previous outings, but Stackpole is a very good storyteller.