The series blends urban fantasy with mythologies of Greek, Norse, Celtic, and Roman descent as well as including a focus on supernatural and paranormal creatures such as shape shifters, demons, witches, vampires, and so forth.
It is recommended that the reader tackle the Dark Hunter Series at least through Styxx before reading any of the Chronicles of Nick.
The in-series chronology makes more sense if digested that way and thus spoilers are avoided that might arise if the sequence is read in reverse.
He teams up with allies including a mysterious love interest Nekoda, a cranky, cynical demonic guardian Caleb Malphas, and a grimoire that has a mind of its own to change his less than stellar destiny of bringing forth mass destruction on the world.
Nick continues to discover the truth of his bloodline, carried by his father, as well as the supernatural realm of New Orleans.