Answer:
The murderer was Jesse Arkwright, the owner of the book, from whom Bernie stole the book.
Step-by-step explanation:
'The Burglar who liked to quote Kipling' is a novel written by Lawrence Block. The book is about a burglar who has started his bookstore, Bernie Rhodenbarr. Bernie was approached by a new collector to steal Kipling's book from the library of a rich man, Jesse Arkwright.
It is at the end of Chapter eighteen, Bernie reveals the name of murderer, Jesse Arkwright. In Chapter nineteen, Bernie goes on to explain how murder happened and what makes Jesse Arkwright, who disguised himself as Prescott Demarest, to kill Miss Porlock.