The League of Lost Souls

Make a wish. Lose your soul. Eleanor Knox and her fellow guests thought the occult ceremony to make wishes was just a party game. They were dead wrong. Almost seven years later, their accidental deal with the devil is coming to an end. At midnight on Halloween their souls are forfeit, and the man who deceived and entrapped them will triumph. Giles Wingate has wealth, influence, dangerous lackeys, and a supernatural entity of unimaginable power doing his bidding.
Eleanor has a bad-tempered witch, a failed journalist, and her three fellow wishmakers, none of whom can stand the others. Wingate's going to rip them to shreds. Eleanor and her reluctant allies have just two months to turn their carelessly made wishes - unwanted, useless, dangerous - into weapons against Giles Wingate's growing, terrible power. Damned if they do. Damned if they don't.