There are 6 books in the Companion series. The newest book is One with the Darkness which came out in 2008.

1
The Companion

Book cover of The Companion
Stripped of his humanity by a woman of extraordinary beauty--and remarkable evil--Ian Rufford must find the key to the curse that haunts him and redemption in Elizabeth Rochewell, a young woman brought up in Egypt and traveling back to a conventional life in England following her father's death. Or
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2
The Hunger

Book cover of The Hunger
The year is 1811, and vampire Beatrix Lisse has spent six hundred years trying to atone for her sins. Yet she can't forget the one man she loved many centuries ago - until she meets John Staunton, the Earl of Langley. John is London's most notorious rogue, but he sees…

3
The Burning

Book cover of The Burning
This work is set in 1821. All who know the beautiful, mysterious Ann Van Helsing believe she is insane. Yet, Ann's curse is the deep psychic ability that allows her to know everything about another human being - their history, thoughts, and desires - simply by touching them. Overwhelmed by…

4
One with the Night

Book cover of One with the Night
Jane Blundell's keen intellect and wit have always set her apart from her marriage-minded peers. But, such differences are nothing compared to the change that comes upon her when she is infected by a blood sample in her father's laboratory. Suddenly, her veins resonate with a terrifying, exhilarating power. Dr.…

5
One with the Shadows

Book cover of One with the Shadows
Kate Malone makes her living reading Tarot cards and fleecing society's elite. With no prospect of independence, her own fate looks bleak. But Kate's fortunes change when she steals a magnificent emerald - and is soon confronted by a mysterious stranger. Kate is sure that the striking gentleman's attention is…

6
One with the Darkness

Book cover of One with the Darkness

Contessa Donnatella di Poliziano has power, beauty, and—as a vampire—eternal life. Her overwhelming regret is a mistake she made centuries ago when she chose not to transform her one true love, Jergan, into a vampire too. Donnatella’s choice has deprived her of the only true love she’s ever known. But…