by Sandi Toksvig - £5.99 Random House Children's Books (1997)
paperback ISBN 13: 9780552545396 | ISBN 10: 0552545392
When Jessica brings her granny into school for 'Unusual Day' Miss Johnson thinks she's got muddled up with 'Family Day'. Her granny may be wearing a tracksuit and trainers, but she still looks like a fairly ordinary granny.
However, when 'Unusual Day' is disrupted by a fire next door, everybody discovers just how unusual Jessica's granny is...
(Price & availability last checked: June 2019)