Cruel King - Horn Sworn, #2

The Collector has all the magic,  holds all the cards, leaving the Cruel King with nothing but blood on his hands. For Wren, her only hope of saving her people now hinges on the one person she can never trust. Calen has regained his horn and all the old debts have been called in. This time there's more than just his horn on the line. They escape the Collector's clutches by fleeing to the beautiful Realm of Unicorns.
But will they find a welcomed homecoming or an inescapable prison?  Can Wren and Calen kill two kings without destroying themselves and their tenuous love? Or will the lies and deceit be too much to overcome?