Wolf's Gift

Five years have passed since the events of Wolf's Lie...
For most of his adult life, Silas has been the protector of the wolf shifters' pack. Detached, deadly and aloof, he avoids emotional entanglements and kills his enemies with precision. But now, even his formidable skills will be put to the test.
With the Endless War raging on, the Shifter Council makes a monumental decision; they are embarking on a mission to Canada, to find out whether or not an ancient and revered species of shifter still exists - a species that could be a powerful ally, or a terrifying enemy.
Heidi knows she has a knack for sticking her nose into trouble. As a seasoned journalist, not much scares her. She's traveled through war zones, interviewed refugees and reported on natural disasters. But when she discovers a laboratory conducting twisted experiments, her courage fails for the first time in years. Terrified and on the run from the sinister Noturatii, she knows she's fighting a losing battle... until a man appears from out of nowhere in the middle of the forest, rescuing her from her pursuers and hinting at a startling underworld operating beneath the fabric of society.
The last thing Silas wants to do is get caught up in Heidi's problems. His pack is already facing enough threats to last a lifetime and they don't need new complications. And the last thing Heidi wants to do is risk her life with this scowling stranger, when it's clear he's keeping far too many secrets from her.
But with both their futures on the line, these two most unlikely allies will be forced to work together... or see their hopes destroyed as the boundaries of the Endless War are rewritten in a way neither of them could have expected.
This book is best read after Book 5: Wolf's Gift.
Books in The House of Sirius series are:
Book 1: Wolf's Blood
Book 2: Wolf's Cage
Book 3: Wolf's Choice
Book 4: Wolf's Guile
Book 5: Wolf's Lie
Book 6: Wolf's Gift
Book 7: Wolf's Bane