Please read the first book called Falling For Derek Hale.
Season 3A: Four months after the events of Peter being back alive and Jackson changing into a Kanima to a werewolf and moving in London, Emily, Scott and her friends are beginning their Junior's year of high school but with new problems. Erica and Boyd are still missing, there's a new pack in town and human sacrifices. Emily learn a few things that starts happening to her...
Season 3B: The Alpha pack has been separated and Scott is struggling to find his place as an Alpha and Emily starts having visions that disturbs her a lot and doesn't why it happens. While she's dealing with that strange power, Stiles, Scott and Allison begin to experience strange side effects as a result of reigniting the power within Beacon Hills. But a new student, Kira Yukimara may have the answers to their problems.
Season 4: Two months after the tragic losses, the group return to a new semester with more human worries than supernatural. Throughout the semester, Emily will struggle with her ability that might change her. Trying to keep a secret from her twin brother and the rest of the pack will be more difficult than she though. Especially when it involves murders and a new enemy known as The Benefactor.