The price is 99 cents or 86p at the moment, but starting tomorrow (Sunday January 1st!) it’ll be completely free for a few days. So if you want it but you don’t want to pay for it, just hang on for another 24 hours and you can get it for free.
For more information about the book, here’s the preview. The next in the series, Dark Season VI: Gothos, will be out on Tuesday 10th January.