Having narrowly escaped a pack of vicious wolves, canine heroes Max, Rocky, and Gizmo are happy to find a moment of peace as they travel down the mighty river. Soon, the trio come across a lavish boat moored close to shore. They're wary of facing another community of dogs, but when they climb on board, they discover that things are different on this ship. These dogs aren't like the power-hungry ones they've encountered in the past. Food is plentiful and rationed fairly. Plus . . . they've seen humans, who Max, Rocky, and Gizmo thought had disappeared without a trace.

The brave companions meet new friends and encounter old enemies in their search for the humans while they travel to places they never imagined -- from a high-speed monorail to a zoo filled with exotic animals. Max, Rocky, and Gizmo uncover secrets that promise to change their lives forever as they draw closer to figuring out why the humans left, and being reunited with their families.

The Last Dogs: Dark Waters is the second book in a thrilling series about three unlikely friends on an epic quest to find their people -- and bring them home.