Crimson Sunrise. Crimson Series, #2

Beware the calm before the storm.Having eradicated the obstacles between them, Emma Johnson and Caleb Blackney are prepared to embrace their future. They have important decisions to make, especially regarding Emma's heritage and her decision to remain human. Unfortunately, Caleb's refusal to allow anyone or anything to harm his mate only complicates matters. Until an unforeseen event changes all the rules.
When Caleb's sister goes missing, personal issues are forced aside. To secure their future, Emma and Caleb must face their fears, confront their enemies, and unite their families to stand against a shadow from her past that could destroy them all.