And She Comes Back (Book 2)

Book 2 of the DeGel Trilogy

Lucy left for 4 years. Canissa hasn't grown much (She's 1,304 years old). Canissa became best friends with Wendy and became S-class.
On the day of Canissa's 1,305th birthday, Lucy comes back, half dead. Porluchka checked Lucy and found out that she had encountered a deadly poison given to her by none other than evil Zeref, but knowing that Lucy trained with the poison dragon before, it was no big deal. She just needs to rest a bit. Canissa and the rest of Fairy Tail became determined to defeat Zeref. However, there seems to be a dark secret that only Lucy knows about. What is it? Will Zeref be defeated? Find out in And She Comes Back!

Disclaimer. I don't own Fairy Tail. Hiro Mashima does.