Wolf's Howl by Arizona Tape

The Winter Stone is finally within Akira's reach, but with it comes a great burden. Even with her mating bond with Ashleigh secured, Akira isn't free from heartache. The Winter Stone requires a sacrifice, and not one that she wants to make.

When the wolf howls, Akira will have a destiny to fulfil. So long as it isn't taken from her...
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Wolf's Echo is the third and final book in the completed fantasy trilogy, My Winter Wolf. It is filled with action, love, friendship, and sacrifice with an f/f relationship at the centre:

#1: Wolf's Whisper
#2: Wolf's Echo
#3: Wolf's Howl
Prequel: White Wolf, Black Wolf
Spin-Off: Triple Threat