A Map of Days : Miss Peregrine's Peculiar Children by Ransom Riggs
Having defeated the monstrous threat that nearly destroyed the peculiar world, Jacob Portman is back in Florida, where his story began. Joined by Miss Peregrine, Emma and their peculiar friends, life has become carefree. They spend days at the beach, and take part in 'normalling' lessons.
But it's not meant to last. The discovery of Jacob's grandfather's subterranean bunker leads to clues about his double-life as a peculiar operative. Jacob begins to learn more about the dangerous legacy he's inherited, and the truths that were part of him long before he walked into Miss Peregrine's time loop.