The second book of the third series, Warriors: Power of Three #2: Dark River by Erin Hunter, brings readers more adventure and action as the clans fight each other for territory, food and shelter. Lionpaw Jaypaw and Hollypaw, grandchildren of the Thunderclan leader; Firestar has more mysteries waiting for them than they even know about. As they thrive as apprentices, they also find things that they wouldn’t expect waiting for them. Where would that lead them? To the underground tunnels, where Lionpaw meets Heatherpaw? Or way back to the mountains and the tribe cats? But as they find travel to the mountains, they may find answers and secrets they never expected.