The transition between past and present were sometimes dizzying but interesting story
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Time Without End by Linda Lael Miller
3rd installment in her vampire series

This centers around the ancient vampire, Valerian, who was introduced and played an important role in the first two novels (Forever and the Night and For All Eternity).

Valerian was a 17-year-old mortal living in a simple village as a bootmaker's son in Cornwall in 1348. He seemed to be cursed from birth as he was admired and emulated by his younger brother, Krispin, obsessively cherished by his mother and, as a result, disliked and unloved by his father. He loved the Lady Brenna although she was of a higher station and was promised to another. Brenna returned his love, and in a brief and innocent moment of comforting her, they were spotted which sent her father into a rage, starting one horrible circumstance after another, resulting in Brenna's demise.

Years later, at 35, he is found by his former tutor and is turned into a vampire. For some mysterious and heartbreaking reason, once a century he comes across his beloved Brenna, although in a new and different incarnation each time, they fall in love and shortly thereafter, she is killed or dies of illness.

It is now the year 1995 and the newest incarnation is Daisy Chandler, a homicide detective in Las Vegas, where Valerian is a headliner (magician and illusionist) at the newly built Venetian Hotel. The cycle begins again, although this time, both Valerian and Daisy are determined to solve the puzzle as to who is murdering innocent women in strange "vampire-like" murders, who is threatening Daisy in connection with these murders, and who has been so determined to repeatedly break Valerian's heart by bringing him face-to-face with his beloved Brenna only to take her away. ( )