Find missing covers here

Curt Purcell’s Groovy Age Of Horror has Ralph Comer novel The Mirror Of Dionysos (1969) – “The elemental powers of white magic contend with a more terrifying form of evil” – and Arkon Daraul’s Witches And Sorcerers (1969).

Sexy Witch has Witches And Sorcerers (1965 and 1969 editions), Ronald Seth’s  Witches and their Craft (1970), Jules Michelet’s  Satanism and Witchcraft (1970) and Louise Huebner’s Witchcraft for All (1971).

Alwyn Turner’s Trash Fiction has the 1965 and 1969 editions of Daraul’s Secret Societies and examples of Tandem’s non-horror output.

Tandem-specific links

There don’t seem to be many of these. Chetwynd-Hayes’ Tandem  paperbacks are discussed at Loughville and there’s a useful illustrated article on some of the Witchcraft titles at the entertaining  sexywitch blogspot