Erin Hunter 
Survivors Book 3 [PDF ebook] 
Darkness Falls

A pulse-pounding animal fantasy series … From the author of the US smash hit series Warriors, confident readers will be enthralled to follow the dog packs as they learn to survive and thrive in a world without human masters. An action-packed series with authentic canine voices that will grip, excite and entertain in equal measure. Lucky has been cast out of his Pack forever. For the first time since the Big Growl, Lucky is desperate to have other dogs by his side … but is it too late? How will Lucky survive in a world where all the rules have changed? Now it’s time for dogs to rule the world!