This August, North American readers snagged over 3.3 million copies of "Harry Potter and the Cursed Child" within 10 days of its release. This comes as a welcomed sign to booksellers, proving that print novel sales can continue to thrive. In fact, sales increased during 2014 and 2015 despite fears that they would continue to plummet after e-readers became a major market player in 2010.
Because paper books continue to prove their staying power, MooseRoots, part of the Graphiq network, crunched the numbers to calculate the cost of a hardcover novel throughout the years. Data analysts used data from the Bureau of Labor Statistics and the School Library Journal to find the historical cost of a book. They then calculated the inflation-adjusted cost and ranked the list chronologically, from 1977 to 2016.