Ranger the time-travelling Golden retriever was trained for search-and-rescue and even though he did not pass the tests he has used his training on his many trips to help people caught up in disasters; now he has arrived at the World Trade Center on the morning of September 11, 2001 just as the first plane hits, and he must rescue fifth-graders Risha and Max who are trapped in the wreckage, guide them to safety, and hopefully reunite them with Risha's mother who works on the ninety-first floor.

Kate Messner is the author of The Seventh Wish; All the Answers; The Brilliant Fall of Gianna Z., winner of the E. B. White Read Aloud Award for Older Readers; Capture the Flag, an SCBWI Crystal Kite Award winner; Hide and Seek; Manhunt; and the Ranger in Time and Marty McGuire chapter book series. A former middle-school English teacher, Kate lives on Lake Champlain with her family and loves reading, walking in the woods, and traveling. Visit her online at katemessner.com.