Sentinel: Archive of Fire by Betsy Dornbusch
Approx. 88,220 words.
Published on January 23, 2013 by
Whiskey Creek Press LLC.
Twins Aidan and Kaelin didn’t realize until they got to university that most guys don’t learn five ways to kill a man by the age of fourteen. Still, since their estranged father descends from the demon Asmodai, it's probably worth knowing how to defend themselves. But as years pass and threat never materializes, the twins suppose their mom is just paranoid - until she disappears.