The Turning by Emily Bex

Immortality beckons.

Unable to escape crushing grief, Kate needs an outlet to channel her anguish. Turning to Luca, she pleads to be trained to fight like a warrior, but such a thing is in direct violation of Shade’s commands.
If she can get Luca to agree, her training must be done in secret.

Unfortunately, any training is too little too late. Intent on crushing Shade,the Aries coven is pressing in on him from all sides. Shade’s only weakness is Kate, who becomes their perfect bait.
While Kate has been made stronger, as long as she’s mortal, her life is in peril. But going through the turning to become immortal would be a big gamble to her survival.
So many decisions, too many obstacles. This second installment in a vampire saga will draw you in from the first page to the spellbinding end.