Elemental Mating by Milly Taiden

Their existence was a secret the government stumbled upon. In exchange for continued autonomy, the paranormals entered an alliance with the government. Now they are A.L.F.A.: Alpha League Federal Agency, sworn to protect and serve humanity.

Brilliant scientist Melinda Caster has discovered a new strain of the Zika virus that stimulates synaptic growth in embryos, causing neuron development beyond normal human levels. Way beyond, like ESP-levels of cognitive abilities. When the lab is broken into, Melinda realizes that someone has been keeping tabs on her research and wants it for themselves. A happy accident destroys critical data before it can fall into the wrong hands, but unfortunately that makes Melinda and her perfect memory a target.

A.L.F.A sends in jaguar-shifter Agent Parish Hamel to discover who is after the virus and why. The beautiful scientist acts like catnip to his senses and throws his mating instincts into overdrive. And then she disappears along with the only sample of the virus…. Now Parish must canvas the darkest areas of the supernatural underground to rescue Melinda, and what he discovers is beyond a paranormal’s worst nightmare.