100 Books to Read Before You Die - This BBC list was chosen by authors and "book experts". This is a very readable list and you should enjoy your reading. It also has audio commentaries on the books. 2018
Books for the Ages - This site gives you 100 books and the age at which each should be read. At age 1, one should read The Very Hungry Caterpillar and at age 60, you should be reading The Five Years Before You Retire. You can check and see what you should read at age 100.
The Big Read - The 100 "most-loved' novels in the United Kingdom as compiled by the BBC. 2003
From 0 to Well-Read in 100 Books - Suppose you have never read any literature and wanted to become "well-read". The author of this list, Jeff, has selected 100 books to achieve "well-read". You might want to argue with some of the selections. Maybe you and/or your book group might want to come up with a better list.
100 Killer Thrillers - The best books of suspense and adventure. This list was the result of votes by listeners of NPR in August, 2010.
Golden Age Science Fiction - This is a list of 75 books from the Golden Age (1934 - 1963). These books seem to be omitted or overlooked in lists of best SF, but they are the foundation upon which modern SF rests.