Guiltless by Viveca Sten, the third book in the
Sandham Murders series,
finally went down to
$1.99. (I've been waiting a while

)
The first two books are also at a reduced price right now:
Still Waters -
$0.99
Closed Circles -
$1.99
The fourth book,
Tonight You’re Dead (
$4.99), is releasing on Nov 14, 2017