The Burrowers Beneath and The Transition of Titus Crow (Titus Crow Series #1 & #2)

The Titus Crow novels are adventure horror, full of acts of nobility and heroism, featuring travel to exotic locations and alternate planes of existence as Titus Crow and his faithful companion and record-keeper fight the gathering forces of darkness wherever they arise. The menaces are the infamous and deadly Elder Gods of the work of H.P. Lovecraft. Chthulu and his dark minions are bent on ruling the earth--or destroying it. A few puny humans cannot possibly stand against these otherworld...