Skin Shifters

The shocking discovery of an amphibious alien body on the island of Tango Key, Florida, ultimately reveals that a planetary alien invasion is underway. Luke Pierce, who works for Omega, a privately funded UFO research organization, is determined this body won't be whisked away by government authorities who then will deny its existence. He and the lighthouse keeper who found the body decide to hide it.
Luke hires Sofia Lopez, a psychic who used to work for Omega, to read the body and find out as much as she can about the alien. But during the reading, a transfiguration occurs - the alien's foot turns human and Sofia's foot becomes webbed. By the time they realize the alien isn't dead, only badly injured, it has escaped and triggered a slew of inexplicable phenomena - missing time, telekinetic incidents, skewed perceptions, and the morphing of Sofia's hands, a webbing that appears and disappears.
They are joined by the pilot who saw the alien's craft crash into the gulf, by a neurologist whose two children were morphed by amphibious aliens, and by George Dylan, a former government agent whose son was killed during an abduction. Pitted against mounting odds, they must defend themselves against the alien race, which is now morphing thousands of humans, essentially stealing their bodies and identities.
Can they be defeated? What's their weakness? Will their annihilation free Sofia and the others?