Conversation so far:
Did Sue Townsend write any books during her later years?
Sue Townsend wrote The Queen and I in 1992.
What is the book synopsis of The Queen and I?
The Queen and I imagines the Royal family have been rehoused in a council estate after a Republican revolution, although it turns out to have been merely the monarch's nightmare
Did The Queen and I sell well?
The Queen and I is a 1992 novel and play written by Sue Townsend, a fictional best-selling political satire revolving round the topic of republicanism in the United Kingdom.

Question: Where did she get the idea for this book?
Self-contained rewrite: Where did Sue Townsend get the idea for The Queen and I?