Scott Sigler, who wrote the excellent horror science fiction novel EarthCore, has a new book coming out today, called Ancestor.
On a remote island in Lake Superior, scientists struggle to solve the problem of xenotransplantation — using animal tissue to replace failing human organs. Funded by the biotech firm Genada, Dr. Claus Rhumkorrf seeks to recreate the ancestor of all mammals.
By getting back to the root of our creation, Rhumkorrf hopes to create an animal with human internal organs. Rhumkorrf discovers the ancestor, but it is not the small, harmless creature he envisions. His genius gives birth to a fast-growing evil that nature eradicated 250 million years ago — an evil now on the loose, and very, very hungry.
You can also get Ancestor as a free audiobook.
Scott says: "Feel free to give you readers this PDF as well. Some people don't get into
the audio." (This is a PDF of the entire book)