The Son Silas Rising — Doug Dahlgren

BOOK ONE of the SERIES : When four members of Congress all die within a few months, each of their deaths appear to be from natural causes. But when mysterious messages begin to appear, in the form of quotations from long dead Revolutionary Heroes, one reporter sets out to prove the existence of a serial killer. His search uncovers dark secrets and an assassin shielded by people who need the very services that only he can provide. Book One of Six