Asher — Mel Teshco

The dragons will search the universe for their one true mate...

Riddich king, Asher Mannett, has more to worry about than the agony of shifting into his dragon form. Tantonics, his alien enemies, will do anything to invade and destroy him and his people, and extract their vital energy.
When the last Riddich stronghold is breached, Asher boards a craft and escapes his planet along with a handful of his people. They crash land on Earth, where a rare few human women can breed with his species, giving his people hope of continuing their genetic line.

Thanks to her now dead fiancé, Luke, Marissa Kinkaid's life has gone from one of decadent luxury to hardship. But then a huge, wounded dragon bursts into her life and opens her eyes to the dreary existence she's accepted as her own. A life she no longer wants.
Despite her fear of abandonment, leaving her drought-affected farm with Asher seems far less complicated than facing Asher's Tantonic enemies. She can't imagine a life without the big, sexy alien in it. But will she lose him too before they've even had a chance at love?