Vampire League - Book V - Nemesis. Vampire League, #5

It's not easy being a vampire. Even though you are the most honest and noble person in the world, people will only see you through the prism of your diet. And that means a ruthless hunt that you can't always escape. The detective team, already familiar to readers, is well aware of this, especially when, under brutal circumstances, it loses one of its members, and a world that seemed orderly and relatively balanced suddenly collapses... Nuntia, a radical branch of vampire society, seems to continue its crusade against those vampires around the world who refuse to submit to it.
However, it soon turns out that the trail is false. Nuntia no longer exists, broken up by an organization called the Order or Brotherhood of Saint Obadiah. According to the findings of a group of friends, this is a kind of sect that believes it exists to hunt bloodsuckers. It is very effective, much more than the infamous Van Helsing Institute, and it is extremely difficult to escape its members who call each other Rastas. A team of detectives leaves Europe, trying to track down the Rast leader and thus destroy the sect.
The trail leads to America, where they stop searching for a while to repair their finances. They are hired by a police detective for an unusual case. They are to free a young woman who lives in a town that is supposed to be cursed. It turns out that the matter is much more complicated than they expected, and in addition, they meet an old acquaintance in the town. They are suddenly helped by their Partner, the same demon that once possessed Meredith Johnson... The activity of Rasta is getting wider and wider.
Stuck in and deprived of support, our friends decide to take a desperate step and return to Paris, where, according to recent news, the headquarters of a sinister sect is to be located. They are accompanied by Fronda's new girlfriend, Lily Ann. She is blind, but she can cope perfectly well. After consulting a mysterious creature named LaSalle, the detectives manage to find the hideout of the Rast leader and finally discover his long-hidden identity.
However, facing him can cost them all their lives, despite the help of the Partner and two others who they just have met.