Altar of bones - Philip Carter

Siberia, 1939. Pregnant with her first child, Lena Orlova plans a daring escape from a brutal Soviet prison camp to the one place she knows is safe: a cave containing the legendary Altar of Bones, hidden behind a frozen waterfall deep in the icy wilderness.
San Francisco, Present Day. Zoe Dmitroff discovers that she is the last in a line of women who have been entrusted with a secret so great many have died preserving it. Propelled into a dangerous quest to discover exactly what she was born to protect, Zoe is soon running for her life from a vicious assassin and an all powerful businessman with chilling plans. Only ex-Special Ops soldier, Ry O'Malley, can help her survive, but with time running out and the web closing in, Zoe will have to make a devastating decision that will transform her forever.
From the frozen wastelands of Russia, to the winding maze of Paris's backstreets, from Washington D.C, through America's mid-west all the way to San Francisco, THE ALTAR OF BONES is a gripping global thriller that spans the generations and unearths the dark secret behind one of the biggest conspiracies of all time.