Boxford author Mark Mason will be signing copies of his new book Walk the Lines at the forthcoming Edwardstone Christmas Fair.
Mark set himself the task of covering London’s underground system by tracking the route above ground.
He took a total of six months and 403 miles to complete the task and the results are detailed in his book.
The popular Edwardstone Christmas Fair takes place on November 10 in the evening from 7pm to 9.30pm and in the morning on November 11 in Edwardstone Church and the Village Hall from 9.30am to 1pm.
Admission is £5 on Thursday night and for the Friday too, and admission for just Friday is £2.50.