There are 9 books in the Saberhagen's Dracula Series series. The newest book is Séance for a Vampire which came out in 2021.

2
The Holmes-Dracula File

Book cover of The Holmes-Dracula File
1887, London, Victoria’s Jubilee -- criminals threaten to release thousands of plague infested rats on the day of celebration. The extraordinary powers of the Count and sharp mind of the Master Detective team up to avert a catastrophic public disaster. (And, the reader discovers more than a deerstalker hat and…

3
An Old Friend of the Family

Book cover of An Old Friend of the Family

The Southerland family left the old world to start anew in America, but little did they know that a blood-feud, older than history itself, would follow them through the generations to come.
Kate Southerland, the first born of the latest generation of Southerlands, has been murdered, but she is not…

4
Thorn

Book cover of Thorn
Jonathan Thorn, a vampire, tries to recover an unknown painting by Leonardo da Vinci from Ellison Seabright, who is suspected of murdering his half brother to acquire the priceless work

5
Dominion

Book cover of Dominion
A Chicago police detective investigates a series of bizarre murders and becomes involved with vampires, sorcerers and the deadly fight to gain control of a magical sword

6
A Matter of Taste

Book cover of A Matter of Taste
Ex-cop Joe Keogh is called in by his brother-in-law, John Southerland, when the visit of Matthew Maule, an "old friend" of the Southerlands, leads to a series of bizarre events, and Keogh soon discovers that the visitor is none other than Dracula himself

7
A Question of Time

Book cover of A Question of Time
Private eye Joe Keogh and his mysterious companion, the quietly malevolent Mr. Strangeways, search across time and in the Grand Canyon for a missing woman. By the author of Books of Lost Swords.

8
A Sharpness on the Neck

Book cover of A Sharpness on the Neck
In 1792, Phillip Radcliffe becomes caught up in the Terror of the French Revolution and unwittingly saves the life of Prince Vlad Dracula, the most honorable of the Nosferatu, bringing down the eternal vengeance of the Prince's evil brother on himself and his descendants

9
Séance for a Vampire

Book cover of Séance for a Vampire
While investigating the drowning and mysterious re-appearance of a young girl, Sherlock Holmes and his faithful assistant, Watson, find themselves entangled with a spiritualist and a vengeful vampire. When Holmes mysteriously disappears, Watson calls for help from the Prince of Vampires. From the quiet English countryside to the nightlife of…