And out of the Darkwood Mr Toppit comes, and he comes not for you, or for me, but for all of us. When the author of ''The Hayseed Chronicles'', Arthur Hayman, is mown down by a concrete truck in Soho, his legacy passes to his widow, Martha, and her children - the fragile Rachel, and Luke, reluctantly immortalised as Luke Hayseed, the central character of his father's books. But others want their share, particularly Laurie, who has a mysterious agenda of her own that changes all their lives. For buried deep in the books lie secrets which threaten to be revealed as the family begins to crumble under the heavy burden of their inheritance. Spanning several decades, from the heyday of the British film industry after the war to the cut-throat world of show business in Los Angeles, ''Mr Toppit'' is a riveting tale of the unexpected effects of sudden fame and fortune. Not since Jonathan Coe's ''What a Carve Up!'' has a novel managed to capture a family and a society to such wonderfully funny and painful effect.