Division

When they received their injections of the original serum, they became immortal and their bodies gained the ability to regenerate, but now the backers have created a new version of the serum and with that serum comes a host of new strengths and abilities that they never even dreamed possible.

It's not just the new serum that's changing things however. With marriages, new team members, a division of the group into two separate operations, the return of an old friend and a visit from two very unexpected guests, Division represents another great leap forward in the evolution of the Unseen Things universe.

Division is book 6 of the unseen things series.