The Brother’s Curse (The Brother’s Curse Saga Book 1) by Christine Germain- Germain

A year after the brutal death of her parents, Crystal Francois moves back home to the eerie small town of Lakeview Falls. When one of her neighbors goes away abruptly, leaving his home to be watched by a young man named Jason Warwick, Crystal finds herself falling for him instantly because of his charming ways and dashing good looks.

Two weeks before her 25th birthday, she receives a rare amethyst necklace left for her by her late mother; A necklace with a deadly past and horrible consequences when worn. Crystal finds out that wearing the necklace causes her and her friends to be the target of two sadistic 18th-century-old Shape-shifter brothers.

In their quest to procure the chariot heirloom that holds their demonic father Mastema and 24 evil entities captive, the Paranormal siblings will wreak havoc in the small suburban town till they find the chosen and annihilate her.

When young men from town go missing, and bodies show up eaten or skinned alive. Lakeview Falls is on high alert. It doesn’t take long for Crystal to discover that the new guy in town isn’t who he claims to be, or if he is even human.