A free PNR from Crimson Romance that sounds interesting:
Immortal Flame by Jillian David
The second book in the series is $0.99:
Relentless Flame
Also, from Entangled,
The Queen's Wings by Jamie K. Schmidt is on sale for $0.99. This PNR features dragon shifters (one of my weaknesses

). I read it when it was first released and quite enjoyed it.