Wriggle and Sparkle by Megan Derr

Lynn is a kraken shifter in every way: detailed, tenacious, resilient, and hard-working. Also possessive, vain, arrogant, and demanding. It makes him an excellent agent for the Federal Bureau of Paranormal Security and Investigation—and impossible to work with, as the long list of partners who have transferred away from him will attest. His newest partner is a unicorn, possibly the worst type of paranormal for work that often turns ugly and violent. Everyone knows unicorns are too delicate for such things. Then Anderson proves to be a unicorn like no other, the kind of partner Lynn has always wanted—the kind of partner he… Read more.