Non-fiction

Mistress of the Monarchy (US) or The Scandalous Duchess (UK) by Alison Weir

Katherine Swynford: The History of a Medieval Mistress by Jeannette Lucraft

Katherine Swynford by Anthony Goodman

The House of Beaufort by Nathan Amin

The Mistress, The Matriarch and The Virgin Queen by Liz O’Rourke

Fiction

Katherine by Anya Seton

Katherine’s House by Sarah Hogg

The Scandalous Duchess by Anne O’Brien

My Lord John (incomplete novel featuring Katherine) by Georgette Heyer

Love, Honor and Royal Blood (3 volumes) by Carol Sargeant