Kitty and The Midnight Hour (Kitty Norville Book 1) by Carrie Vaughn is currently $1.99 in the US
https://www.amazon.com/dp/B0012Y1GMO
vN: The First Machine Dynasty by Madeline Ashby is currently 99c in the US
https://www.amazon.com/vN-Machine-Dy...dp/B0076Q1J60/