This book is an absolute classic. It is absolutely chock full of good humour, memorable characters and a quaint old world Britain (based on Michael Bond's memories of life before the Second World War).
Paddington Brown is the name settled on by Mr. and Mrs. Brown for the little stowaway bear from Darkest Peru whom they befriend in a London train station and take home to stay with them. He is a very polite little bear - the sort who always wears a hat so he can raise it as he greets a person - with a weakness for sticky buns and marmalade sandwiches who always manages to get himself into some sort of trouble with the best of intentions. Anyone who has ever had a plan of theirs go a bit differently than they had expected, been completely puzzled by some strange custom of their friends and neighbours or accidentally dropped a marmalade sandwich on the head of a theatre patron sitting below them will relate with Paddington.
I loved stories from this book as a child, and probably even more so as an adult. I think they are best when shared - reading aloud with a friend, for instance. Please have patience with anyone reading them aloud to you as you both will probably end up laughing so hysterically you won't be able to speak at least once during the book.