Melissa Harrison 
Clay [EPUB ebook] 

Eight-year-old TC skips school to explore the city »s overgrown, forgotten corners. Sophia, seventy-eight, watches with concern as he slips past her window, through the little park she loves. She »s writing to her granddaughter, Daisy, whose privileged upbringing means she exists in a different world from TC – though the two children live less than a mile apart.
Jozef spends his days doing house clearances, his nights working in a takeaway. He can »t forget the farm he left behind in Poland, its woods and fields still a part of him, although he is a thousand miles away. When he meets TC he finds a kindred spirit: both lonely, both looking for something, both lost.