An alternative health treatment killed Hannah’s cousin. Now she’s on a mission to warn others

Hannah McElhinney Patricia Casten/Simon & Schuster Wormhole begins quickly. Hannah McElhinney’s cousin, who has travelled to Malaysia for a medical treatment, has sepsis. She’s in a coma. One page later, she’s dead. The pacing of the book’s opening matches the quick, often uncertain feeling of experiencing a medical emergency with a loved one. Review: Wormhole: My journey into the dark heart of alternative medicine by Hannah McElhinney (Affirm Press) Then the book rewinds, revealing…