Which bestselling thriller series was created through a collaboration between two authors, with one providing the character and the other continuing the series after the original creator's death?

Throughout literary history, some authors have collaborated to create memorable works, combining their unique styles and perspectives. These literary partnerships have produced classics that might not have existed if the writers had worked alone. This trivia question explores one of the most commercially successful literary collaborations of the modern era, testing your knowledge of how certain bestsellers came to be.

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The Jason Bourne series (Robert Ludlum and Eric Van Lustbader)
The Jack Ryan series (Tom Clancy and Mark Greaney)
The Women's Murder Club series (James Patterson and Maxine Paetro)
The Millennium series (Stieg Larsson and David Lagercrantz)