The Agartha Talisman - The Agartha Talisman, #1

An unassuming house, two missing children, a world hidden beneath our own. When Abi moves home with her family, it isn't long until she discovers that the previously long-abandoned house holds a sinister secret. Fleeting shadows move between rooms, the family dog senses unseen forces, strange things happen. But this is no haunting. A chance discovery triggers a chain of events leading to the opening of a portal to Agartha and caught between two warring factions, the mystery begins to unravel.
Alongside an unlikely ally, Abi embarks on a perilous journey facing physical and emotional demons. Danger lurks around every corner where creatures beyond imagination lie in wait. Can she find the missing children and return home where things may never be the same again?