Steal the Sun (Thieves Series #4)

Zoey thought she would never have to choose, but to save one husband, she will have to betray the other... As Zoey Donovan-Quinn first sets foot in the faery homeland of her beloved Devinshea, life is perfect. Her enemy is defeated, her heart is full, and Neil and Sarah are at her side. Daniel and Dev are happy, so their visit to the sithein should be a pleasant honeymoon full of wonder and joy. Well, except for the part where Zoey needs to steal an ancient gem from the Queen of Faery in or...