A question I keep getting asked is how many Peter Grant books are there going to be and whether it is a trilogy, a quadrology or whatever. For clarity I'm going to answer this in two ways...
1) The Peter Grant books should be thought of as an ongoing series of detective novels in the manner of Ian Rankin, P.D. James or Ed McBain's 87th Precinct. There are some elements and story lines that carry over and develop from book to book but it is not a trilogy in the fat fantasy series sense.
2) Currently I am working on book 4 which should be completed before Christmas and published, probably, in the spring. So far Gollancz (Orion) have commissioned me to further write 5 and 6.
Assuming that people continue to buy the books I plan to keep writing them until I run out of ideas or I can afford a yacht(1). I plan to write some non Peter Grant books at some point but I'm having far to much fun with the Folly at the moment to quit.
(1) And I'm not talking about some dinky dinghy with sails I'm talking about a fuck-off oligarch, James Bond villain yacht here.