Defend the Tabernacle by Deacon Patrick Augustin Jones
Catherine and Bernard get whisked away to do battle on the Soulscape, where the true nature of things is revealed.
Will Wilder and the Relic of Perilous Falls
Follow Will Wilder as he discovers a hidden world, fights demons and rescues a hidden treasure!
Arrow in Flight by Jane Lebak
If you want a gorgeous read delving into the world of angels that reflects actual accepted beliefs about them then this is the book for you.
Shadowmancer by G.P. Taylor
A dark fantasy along the lines of Revelation itself.