Knot My Sister's Keeper — Mary Marks

In tracing her ancestry, quilter Martha Rose discovers a ritzy half-sister, a stash of family secrets, and a decades-old mystery that only she can unravel...

Martha Rose is shocked to find she has a half-sister, especially one so different from her. Giselle Cole is wealthy, widowed, and lives a glamorous life in West Los Angeles. At least her grandmother was a quilter! But Giselle can't answer Martha's many questions about their father -- he disappeared when she was only a child and the few clues left behind indicate he may have been murdered. So Martha and Giselle team up on an investigation that weaves them through the streets of L.A., their father's hidden love affairs, and into some mysterious unfinished Cole family business...