THE CHILD Fiona Barton Penguin Random House, $33
When a workman demolishing an old house discovers a tiny skeleton, it barely rates a paragraph in the local newspaper, but journalist Kate Waters – returning from Fiona Barton’s bestseller The Widow – senses a bigger story. In separate parts of London, two strangers also find the mystery impossible to ignore. As Waters investigates, two shocking crimes are revealed. One had rocked the city decades earlier but remained unsolved; the other undiscovered until now. Both hold the key to the baby’s identity. Starting as a slow-burn, this is an engrossing and clever psychological mystery of loss, survival and maternal instinct that gathers pace to keep you guessing until the unexpected yet emotionally satisfying end.