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Anna has joined a bear research team in Glacier Park. They hope to gather enough information to form a picture of its Grizzly bear population.

In the fourth book in the saga of those left behind, the Tribulation Force, comprised of pilot Rayford Steele, his daughter Chloe, and reporter Buck Williams, continues its adventures after the Rap

Ray Steele knows he is absolutely sure of one thing--he does not want to take over the family business. Instead, he dreams of becoming a pilot.

Griffin, a newborn bat, thinks he's nothing like his heroic father, until he gets dragged to the Underworld and must find his way home while his father braves the odds to get him back as well.

When a newborn bat named Shade but sometimes called "Runt" becomes separated from his colony during migration, he grows in ways that prepare him for even greater journeys.

Continues the adventures of Shade, a young bat, as he searches for his father and struggles to prevent the evil jungle bat Goth from wiping out the sun.

Exhausted by efforts to stop a wildfire that has already devoured 17,000 acres in California, ranger Anna Pigeon takes refuge when the fire crosses her path and emerges with nine other people, only

Anna Pigeon's job as U.S. National Park Service Ranger has lead her to Lake Superior--where an unaccounted-for corpse has turned up among the victims of a 70-year-old shipwreck.

The Tribulation Force travels to Israel for the Meeting of Witnesses as further judgments are released upon the world.

It has been three and a half years since the Rapture took up the bodies of the innocent to Heaven.

Throughout the world, people have mysteriously disappeared. Theories abound--terrorists, UFOs, aliens from another planet. For those who have been left behind, the apocalypse has just begun.

In the eighth book in the saga of those left behind, those who were left behind after the Rapture must now make a crucial decision.

The third book in the saga of those left behind, "Nicolae" follows the adventures of The Tribulation Force, made up of pilot Rayford Steele, Chloe, his daughter, and reporter Buck William

Dusk, the world's first bat, must lead his colony to safety in a time of changing species.

Matt, a young cabin boy aboard an airship, and Kate, a wealthy young girl traveling with her chaperone, team up to search for the existence of mysterious winged creatures reportedly living hundreds