She's All Alone - Georgia Wagner - Bog

Genius Chessmaster and FBI consultant Artemis Blythe is now suspected of murder, accused of picking off competition in her upcoming tournament.
The evidence is iron clad. They have her on camera entering the room of the most recent murder victim minutes before he died.
The FBI is sent to arrest her, and Artemis is forced to flee, running to her brother-who has ties to the Seattle mob-in order to lay low. It's now a race against time for Artemis to clear her name and find the real killer before the FBI locates her.
But time spent with her twin brother yields clues to another case-the disappearance of their sister, seventeen years ago. In a shocking climax, Artemis learns once and for all: what happened to Helen? All the while tackling her most mind-bending case yet.