This time the mysterious box that Ranger the Golden retriever found transports him to a Maryland plantation before the Civil War, where he must help a young house slave named Sarah and her younger brother Jesse find their way to the underground railroad and North to freedom, before Jesse is sold to a plantation further South.

The mysterious box that Ranger the golden retriever found in the garden transports him back to first century Rome, where he must rescue Marcus, a young servant boy, and Quintus, a volunteer gladiator, from the brutal world of the Colosseum.

This time the mysterious box transports the golden retriever Ranger back to the shipyards of Belfast in 1912, where a ship is being prepared for her maiden voyage, and when he saves young Patrick Murphy from being crushed by falling boards, Ranger expects to be transported home; when he is not, he knows that somehow his job is not finished--but then, Ranger has never heard of the Titanic, and knows nothing of the fate that awaits Patrick, and all...

Ranger, a time-traveling golden retriever with search-and-rescue training, heads to Normandy on the morning of the D-Day invasion where he meets Leo, a Jewish boy who is hiding with a local farmer, and Walt, a young American soldier fighting to free France from the Nazis.

Ranger the time-traveling 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...

When the mysterious first aid kit takes golden retriever Ranger to New Orleans shortly before Hurricane Katrina hits, he finds himself helping Clare Porter and her grandmother, who are waiting for Clare's father at their home in the Lower Ninth Ward--andwhen the levees break and Clare is separated from Nana, Ranger must somehow get her to the relative safety of the Superdome, and reunite her with her family.