Mist and Memory - The Heartwood Chronicles, #2

A sinister and shadowy organization. The young mages who oppose it. The hunt for ancient relics has begun. Cloud Village Arc: Lisette never thought she would return to the mountains she fled as a child. But when Tamsin, a Heartwood alumna, invites Amber, Naia, and her on a job in the area, Lisette figures it's time to get over the past. However, this all-girls trip turns out to be anything but routine when the mages find Tamsin's campsite in disarray and her colleagues missing.
For the unscrupulous Red Dawn has moved into the mountains, and it will stop at nothing to obtain greater power. Mirror Vale Arc: Three girls went into the mountains, and they all came back changed. For Amber, the change brings about a resolve to finally unravel her complicated feelings about her dead father and deal with his memories that were gifted to her. But the people who wanted to use her abilities in Hopeswell haven't given up on her.
Taken to the mysterious Mirror Vale, an eerie place that plays havoc with her pattern senses, Amber is about to uncover a shocking secret. This volume of the anime-inspired fantasy The Heartwood Chronicles contains two completed arcs and a bonus short story featuring Troi and Naia.