Sarah Gailey 
Vampire Slayer, The Vol. 1 [PDF ebook] 

In the first arc of WILLOWVERSE, trying to help Buffy heal from her trauma proves to be more than Giles and Willow bargained for! She’s left without her powers or identity, and it’s up to an unprepared and inexperienced new Slayer to take up the mantle-Willow. But thankfully Willow isn’t alone, as the spell also leads to another newly-activated Slayer, serving as a guide for this speed-run of training. But even with the threat of 4 terrifying and sometimes zany monsters, the darkest threat may be Willow herself, as she struggles to cope. Can Willow’s allies save her from herself?Collects The Vampire Slayer #1-4.