Under the Hill series by Alex Beecroft

Born in Northern Ireland during the Troubles and grew up in the wild countryside of the Peak District. She studied English and Philosophy before accepting employment with the Crown Court where she worked for a number of years. Now a stay-at-home mum and full-time author, Alex lives with her husband and two daughters in a little village near Cambridge and tries to avoid being mistaken for a tourist.
Alex is only intermittently present in the real world. She has lead a Saxon shield wall into battle, toiled as a Georgian kitchen maid, and recently taken up an 800-year-old form of English folk dance, but she still hasn’t learned to operate a mobile phone

Genre: Romance | Fantasy | MM

#1. Bombers Moon:
When Ben Chaudhry is attacked in his own home by elves, they disappear as quickly as they came. He reaches for the phone book, but what kind of exterminator gets rid of the Fae? Maybe the Paranormal Defense Agency will ride to his rescue. Sadly, they turn out to be another rare breed: a bunch of UFO hunters led by Chris Gatrell, who—while distractingly hot—was forcibly retired from the RAF on grounds of insanity. Shot down in WWII—and shot forward seventy years in time, stranded far from his wartime sweetheart—Chris has been a victim of the elves himself. He fears they could destroy Ben's life as thoroughly as they destroyed his. Chris is more than willing to protect Ben with his body. He never bargained for his heart getting involved. Just when they think there's a chance to build a life together, a ghostly voice from Chris's past warns that the danger is greater than they can imagine. And it may take more than a team of rank amateurs to keep Ben—and the world—out of the elf queen's snatching hands... Warning: Brace yourself for mystery, suspense, sexual tension, elves in space and a nail-biting cliffhanger ending.

#2. Dogfighters:
Kidnapped by the faerie queen, Ben is confronted with his own supernatural heritage, a royal family and a lover he doesn't remember. His first instinct is to turn his back on them all and get back to Earth. Compared to this, Chris and his wacky cohorts seem almost...normal. Back on Earth, Chris Gatrell is having trouble convincing the police that he didn't do away with Ben and hide the body. Determined not to lose another sweetheart to the elves' treachery, he presses his motley crew of ghost hunters to steal a Mosquito bomber...and prays the ghosts of his WWII crew will carry them through the portal to Ben's rescue. Meanwhile, Chris's elf-trapped WWII love, Geoff, has a dragon and he's not afraid to use it. If only he could be entirely sure which of the elf queens is the real enemy—the one whose army is poised to take back planet Earth for elf-kind. In the cataclysmic battle to come, more than one lover—human and elf alike—may be forced to make the ultimate sacrifice. Warning: Dragons dogfighting with fighter planes, time travelers and reincarnated celestial beings are all very exciting, but have your hankies ready for a bittersweet ending.