When Jack and Annie discover a mysterious tree house filled with books, they never dream that it will take them on exciting adventures around the world and throughout history! The story begins with Dinosaurs Before Dark, when Jack and Annie are whisked back to the prehistoric past. With a total of twenty-eight adventures, kids will never get tired of traveling the world and completing missions with their new friends Jack and Annie.

Books in this set include:
-Dinosaurs Before Dark (#1)
-The Knight at Dawn (#2)
-Mummies in the Morning (#3)
-Pirates Past Noon (#4)
-Night of the Ninjas (#5)
-Afternoon on the Amazon (#6)
-Sunset of the Sabertooth (#7)
-Midnight on the Moon (#8)
-Dolphins at Daybreak (#9)
-Ghost Town at Sundown (#10)
-Lions at Lunchtime (#11)
-Polar Bears Past Bedtime (#12)
-Vacation Under the Volcano (#13)
-Day of the Dragon King (#14)
-Viking Ships at Sunrise (#15)
-Hour of the Olympics (#16)
-Tonight on the Titanic (#17)
-Buffalo Before Breakfast (#18)
-Tigers at Twilight (#19)
-Dingoes at Dinnertime (#20)
-Civil War on Sunday (#21)
-Revolutionary War on Wednesday (#22)
-Twister on Tuesday (#23)
-Earthquake in the Early Morning (#24)
-Stage Fright on a Summer Night (#25)
-Good Morning, Gorillas (#26)
-Thanksgiving on Thursday (#27)
-High Tide in Hawaii (#28)