I have been writing A Level study guides on The Canterbury Tales for over thirty years. Current:

The Wife of Bath’s Prologue and Tale
Hodder Education, 3rd edition 2016
ISBN 978-1-4718-5419-4
See at Amazon

The Pardoner’s Prologue and Tale
Philip Allan Literature Guide for A-Level
Hodder Education, 2nd edition 2011
ISBN 978-1-4441-2159-9
See at Amazon

Also visit Amazon author page for Richard Swan Richard Swan