London, 23 February: British novelist JK Rowling’s foray into crime fiction is expected to be a seven-part epic along the lines of her hugely popular Harry Potter series. The Cuckoo’s Calling, her first book written under the pen name Robert Galbraith, was published last April and had sold fewer than 1,000 copies before The Sunday Times unmasked Rowling to be its author. It has gone on to sell more than 6,00,000 English language copies in hardback and another 1 million in eBook form. The Silkworm, the second in the series, was written before the first was published and will be released in June. A report in the Times quoted publishing sources as saying that Rowling has been working on the third since last year.  PTI