I purchased a secondhand, paperback copy of First to Burn (by Anna Richland) in a physical store.
Description from Goodreads:
A soldier with secrets
Immortal Viking Wulf Wardsen once battled alongside Beowulf, and now serves in Afghanistan. He’s trusted the mortal men on his elite special operations team to protect his secret, until an explosion lands Wulf in a place more dangerous to him than a battlefield: a medevac helicopter.
A doctor with questions
Army captain Theresa Chiesa follows the rules and expects the same from others, even special forces hotshots like Sergeant Wardsen. She’s determined to discover the secret behind his supernaturally fast healing, and she won’t allow his sexy smile to distract her.
An enemy with nothing to lose
Even as Theresa’s investigation threatens to expose him, Wulf is stirred by her passion. Dreaming of love and a normal life, he wants nothing more than to build a future with her. But the lost Viking relic needed to reverse his immortality is being hunted by another—an ancient enemy who won’t hesitate to hurt Theresa to strike back at Wulf.
Pretty good for what it is. But what it is is a bit of fluff. I enjoyed the banter between the main characters and the humor of the Special Forces men. I liked that the heroine was a soldier herself and came back strong after a fairly traumatic injury. I liked that the hero wasn’t an alpha A-hole and was really responsive to any ‘no’ she uttered, without any guilting or attempted manipulation.
I did think the narrative had too much going on, the whole immortality schtick wasn’t well enough developed to actually be needed, and the villain was defeated too easily. Also, the little bit of light, kinky play as therapy irritated me. Despite all that, I’d read more of the series and certainly more by this author.