For the writers, you'll be interested in how many books I had to sell for that to happen - 70! Currently, I'm No.252 (16 in Police Procedurals) and I've sold 94 books in the UK in about 8 hours. The number of books sold in a short space of time obviously factors into algorithms that are interested in that type of thing!
It took me about 4 months to write that book - 77,500-words, and after I'd written each chapter I sent it to the proofreader, and it worked very nicely, because as soon as I'd finished the book there was no delay - I simply published it.
Also, I've nearly finished the first chapter of the next book (No.6) in the series - 'The Breath of Life', which I'll publish on here soon, but don't get too excited because I've made promises. Apart from writing a short for an American anthology, I've also got to write 'The Skulls Beneath Eternity Wharf' (Quigg 3) and 'The Gordian Knot' (Stone & Randall 2) before I get to Parish & Richards 6.