The first two books in the series are on sale for just $0.99 / £0.99 through November 4th (you save $4).
Come Sunday, November 5th, Book 1 (Playing with Fire) will go back to its full price, and Book 2 (Playing for Keeps) will go back to normal soon after that.
PLAYING FOR KEEPS - $0.99
PLAYING DIRTY - $2.99
Hurry, because the sale ends on Sunday!