Widdershins, Sunwise and The Running Wolf are all available as audio books.
Christine Mackie has narrated Widdershins and its sequel, Sunwise. You may recognise her dulcet tones from TV series such as Downton Abbey, Wire in the Blood and Coronation Street.
Richard Turner has narrated The Running Wolf. You might recognise his voice from The Museum of Curiosities, which he produces for the BBC.
Try a sample below.