Selling well: If I Die Before I Wake is a "Heatseeker"

It's been a good week or so for If I Die Before I Wake - I think perhaps being Thriller of the Month at Waterstones might have had something to do with it!Industry magazine The Bookseller has something called the Heatseekers charts, which - as far as I understand - lists books which are selling well, even if not well enough to get into the top 10 bestsellers list.And If I Die Before I Wake is at number three in the Heatseekers list this week!The Heatseekers charts are compiled using titles by authors who have not appeared in the Official UK Top 50 since records began with the company that now records sales.If you've bought a copy of the paperback since it came out, thank you!