Mecha Origin Series by Eve Langlais

When a friend drags Agatha “Aggie” Bowles to a romance convention, all she wants to do is find some new authors and a quiet spot to read. Instead of relaxing with a book, she ends up kidnapped by a steampunk cyborg. Which is as exciting as it sounds. Except for the fact he’s more interested in the cog hanging around her neck than Aggie herself. He’ll do anything to get his hands on it. Problem is other people want it, too. Can this cyborg relinquish a priceless treasure for love?

Wulff’s cogs are in a jam because of Ursy, his best friend’s little sister. Only she’s not so young and bratty anymore. And she’s got a nice set of gears. However, Wulff has no intentions of stealing her upgrades. Nor is he interested in bedding her, even if she makes his parts steam. He really should stay away, and yet he enlists her aid in tracking down a treasure. A mission that’s going fine until the kiss... moreWulff’s cogs are in a jam because of Ursy, his best friend’s little sister. Only she’s not so young and bratty anymore. And she’s got a nice set of gears. However, Wulff has no intentions of stealing her upgrades. Nor is he interested in bedding her, even if she makes his parts steam. He really should stay away, and yet he enlists her aid in tracking down a treasure. A mission that’s going fine until the kiss. Now, he can’t help seeing her in a new light, but Ursy isn’t interested in a relationship, even as she invites him to her bed. Problem is he wants more than just a temporary meshing of their parts. He won’t settle for anything less than her heart. less

Best friends Zak and Ray have only one goal in life: Upgrade their bodies until they’re more metal than flesh. But to do that, they need to find more gears. And who better to help them find lost treasure than a seer who can predict the future and decipher the past? Funny how she didn’t predict her own kidnapping. Nema isn’t impressed with her supposed rescue by the Siyborghs. Part male. Part metal. She doesn’t approve of the parasitic cogs in their bodies... moreBest friends Zak and Ray have only one goal in life: Upgrade their bodies until they’re more metal than flesh. But to do that, they need to find more gears. And who better to help them find lost treasure than a seer who can predict the future and decipher the past? Funny how she didn’t predict her own kidnapping. Nema isn’t impressed with her supposed rescue by the Siyborghs. Part male. Part metal. She doesn’t approve of the parasitic cogs in their bodies. Especially since they pose a danger. That doesn’t stop her from desiring them. Even more tantalizing, they both want her, too. less

When an intrepid explorer finds a lost temple, what's inside will change the course of history. The planet is dying, and yet Jool is convinced there's a way to save its people. The answer lies in a deadly mountain range that no one dares explore, but he doesn't have a choice. The voice in his head proves insistent. With nothing to lose and everything to gain, Jool sets out to find the truth--and almost dies on his journey... moreWhen an intrepid explorer finds a lost temple, what's inside will change the course of history. The planet is dying, and yet Jool is convinced there's a way to save its people. The answer lies in a deadly mountain range that no one dares explore, but he doesn't have a choice. The voice in his head proves insistent. With nothing to lose and everything to gain, Jool sets out to find the truth--and almost dies on his journey. When he stumbles upon a hidden temple, he won't just find salvation and a cure for his wife, he'll becomes the first prophet to serve the Mecha Gods. Are you ready for the story of the first gear? less