Hollow World - C Michael McGannon - Bog

Having reached the protective shadows of the Fox Den, Lukos and Kit barely have time to breathe before their pursuers pick up their trail once more. Only now, an evil from eras past has been awakened and released to hunt them, creating panic in the world underneath Limbo. Meanwhile, in the city itself, forces of nature and political masterminds begin to clash, forming alliances and making bargains that even a devil would hesitate to agree to. A sacrifice will be made, but it may be too little, too late.