He is Timeless, and yet when Parvati manifests, it is time for Shiva to arrive

Having read so many beautiful books on Shiva myself, I believed it was important that not just Shiva’s endearing mythology, but His scintillating spirituality,as well, both needed to be known.The twin wings that make the truly ethereal flight He eternally embarks upon. It became my call to write a book that gives equal emphasis to Shiva’s story and reveals the fabulous mystic that He is, and indeed, has always been.
 At first, I was overwhelmed by His infinite aspects: What could one write about Him, who is Timeless, Limitless and Boundless? And then, the question itself revealed the answer. One sure mark of Shiva, is that He is bound to Parvati. It is said of Shiva that He does not incarnate. Of Parvati's bhakti (devotion), it is said She is one who can make even Shiva incarnate.
He is Timeless, and yet when Parvati manifests, it is time for Shiva to arrive. He is formless, but when She arrives, He manifests form. She is His eternal soulmate, and they always find each other, through the mists of cosmic time, even through lifetimes; such is the magic of their love! For it is said, Parvati is His wife even from Her previous birth, when She was called Sati.
And I realised that behind the innumerable tales about Him,
at the core of the myriad roles that He plays out, Shiva's story,
is essentially a love story, over and over again.
( Author's preface for SHIVA, The Ultimate Time Traveller.)