Following is a post I made way back in 2012 about the beginning of 
paperbacks.  An article in the Mental Floss Magazine had caught my eye, 
and I shared it with readers.  I updated this post a bit in 2016, and I'm doing some more editing and adding now, in 2022, and sharing 
it again on the birthday of the paperback book.  The history actually 
began in 1935 by Allen Lane who founded Penguin Publishers in England when they published their ten 
original paperbacks, so I'm including a piece on that, too.  The United States was about four years later than the UK in trying out this new way of making books more affordable and accessible.  Robert de Graff in partnership with publisher Simon and Schuster came out with Pocket Books in June 1939 to "transform New York's reading habits."
For those readers who have great patience and can stand to wait for a
 book to appear in paperback form, they can enjoy a great read that is 
more affordable and easier to carry.  There are even two sizes, the mass
 paperback (the smaller and uniform in size) and the trade paperback 
(the larger and not always the same size).  Some authors, who are 
particularly popular in general or with a specific title, are published 
in both the mass and the trade.  I much prefer the trade paperback (when
 I can wait and not demand the expediency of the hardback), as the print
 is larger and there is more white space between sentences.  It's 
partially an age-related preference, but I actually like the feel of the
 larger books, too.  My least favorite type of paperback in either mass 
or trade is the movie-cover paperback.  I like my reading served up with
 a little less direction and more imagination.  What steered me toward 
thinking about paperbacks is the article on the origin of 
the paperback book in the United States back in 2012 in Mental Floss Magazine.  Originally called pocket books, for obvious 
reasons, the mass paperback still follows that form.  Of course, the 
current trend of e-reading is analogous to the advent of the paperback, 
and it is mentioned in the article, too.  I am including the article 
from Mental Floss Magazine so that others may also enjoy a little 
history lesson in reading.There are so many great paperback versions since their beginning, and I plan on exploring a few of those in another post.  Today is just about the beginning.
Below are links to "How Paperbacks Transformed the Way Americans Read" in Mental Floss, "How the Paperback Novel Changed Popular Literature" (which starts with Allen Lane and Penguin in the UK) in Smithsonian Magazine, and a video link about Penguin's paperback beginning.  Enjoy!
                               
                              http://www.mentalfloss.com/blogs/archives/137715
                           
From the Smithsonian Magazine site, here is a link to their article about Penguin's foray into the new world of making books more affordable to more readers by introducing the paperback. 
http://www.smithsonianmag.com/arts-culture/how-the-paperback-novel-changed-popular-literature-11893941/?no-ist  
Here's an amazing video talking about Penguin's revolutionary paperback beginning.  It's #2 in a series of seven videos about the history and future of Penguin called "The Bird You Have Throughout Your Life."
 https://www.youtube.com/watch?v=gJukjWCULXk