What is the main conflict in Practical Magic by Alice Hoffman?

Practical Magic by Alice Hoffman is the story of Sally and Gillian Owens. The Owens family is comprised of witches but being magical doesn't solve their problems. Sally and Gillian must come to terms with who they are in order to rid themselves of the ghost that now haunts them. This story focuses on the relationships between the women in the family and how they learn to appreciate each other and their own lives.