That book you remember the plot of but not the name...

[ashandar]

been looking for a book from a series the details of the book i remember are when the evil vampires turn someone they come back crazy and need to be put down for everyones safety at the start the main female gets turned that way but the vampire who killed the bad guys decides to try to save her the main guy in the story was the first vampire and also a demigod son of Nyx the goddess of darkness but no one knows this but him at one point in the story Apollo kidnaps the girl and traps her outside just before daybreak and when the mc goes to save her he cant get the chains off so has to shield her with her body from the sun while Apollo taunts him and while the sun cant kill him since he is a demigod he is very hurt by it if anyone knows the name of this book or the series it is in and could let me know i would be very thankfull