Maxim Gunn and the Demon Plan

Witchcraft in the twentieth century? Computer controlled demons? Maxim Gunn didn't believe it either - until his old enemy Wanda Liszt, miraculously returns from the dead with another plan to control the world.
Ambushes, a booby trapped tomb, a demonic attack by the fiend Wanda controls keep Gunn on his toes, until, with a little help from the giant Swedish archaeologist, Torquil Tornquist, the crashing finale is reached in Turkey's Taurus Mountains.