Vampire Nights by Timothy Moriarty

"Libby had lived with Tim for years and still did not know where he went at night--until she did a little snooping. Now she is caught in a ghastly nightmare of bats, blood, and vampires in this bloodcurdling tale of creatures of the night." (from Amazon.com)

Paperback Info: ISBN 1558171800, Pinnacle, 1989