The Visitors by Trish Kocialski

The exciting adventures of Dean and Katie continue in The Visitors. The winter holidays are over and our heroines are back from a quick vacation to St. John in the U.S. Virgin Islands. As they settle back into their routines they find their lives turned upside down after a series of bizarre incidents plunge them into a sea of death and destruction. These strange events take an even stranger twist as they work with a pair of extraordinary allies. Will they be able to solve the mysteries that abound or will they succumb to a power stronger than any force on earth? Turn the pages and get ready to take a thrilling ride as Colonel Deanna Peterson and Special Agent Katherine O'Malley put their lives in the hands of two celestial allies.

nominated for Best Sci-Fi for 2005 by GCLS and Gaylatic Spectrum Award.