Cosmo’s granddad used to be the cleverest person he ever knew. That is, until his granddad’s mind began to fail. In a rare moment of clarity, his granddad gives Cosmo a key and pleads with Cosmo to go to the South Gates of Blackbrick Abbey, where his granddad promises an “answer to everything.” In the dead of night, Cosmo does just that. When Cosmo unlocks the rusty old gates, he is whisked back to Blackbrick of years past, along with his granddad—now just sixteen-years old and sharp as a tack—beautiful Maggie, and the absolutely dreadful Corporamore family. But much more than time travel adventure awaits Cosmo on the old, sprawling estate: he’ll also discover revealing truths about his granddad, his family, and himself. Abounding with humor and heart, this extraordinary novel is an original, unforgettable story about lost memories, lost times, and lost lives, reclaimed.