The Associated Press / AP file photoA selection of the top 10 most popular textbooks for fall 2019.

A selection was made of the 50 most popular titles for 2019 in the AP’s 2018 list of the best college textbooks for the year.

AP photo/AP Students use a mobile device to view a map of campus as the school begins to open for classes in Palo Alto, Calif., on Tuesday, Aug. 19, 2019.

Students use a device to access the online version of the AP College Prep 2016 app.AP Photo/Paul Sakuma Students listen to an audio presentation about their college experience at the University of Southern California on Monday, Aug, 16, 2019, in Los Angeles.

Students listen to a audio presentation from the 2018 College Prep Awards presented by U.S. News & World Report.AP Photos/Mark J. Terrill A view of a large mural depicting the Statue of Liberty, with the word “LIBERTY” and a heart above it, in New York City.AP photos/John Angelillo A student takes a selfie during a demonstration to support the rights of LGBT students to use bathrooms of their choice at the UC Santa Barbara campus on Monday.AP photo/Michael Nagle A student holds a sign that reads “I AM LABOR,” as she holds a banner reading “No Backslash” during a rally against the transgender bathroom bill in Los Angles, Calif.AP:AP Students cheer as they take part in the 2018 NCAA Men’s Basketball Tournament, on Sunday, July 30, 2018, in Orlando, Fla.AP AP:AP A student wearing a “Trump is evil” shirt stands in front of the Trump International Hotel and Tower in Los Quebrados, Mexico, on Monday July 29, 2018.AP file photoStudents watch a live broadcast of the 2018 U.N. General Assembly on Sunday July 28, 2018 in New Delhi.AP / Getty Students wait for the start of the 2017 NCAA Men, Basketball Tournament on Sunday in Las Vegas, Nevada.AP File Photo Students walk past the Statue a statue of former U.T. president and U. of Tennessee Chancellor James B. Patterson, on the campus of the University at Buffalo, as they gather for a march and rally on campus on Tuesday July 21, 2017, in Buffalo, N.Y.AP/Brian Tromans Students listen as they listen to the 2018 AP College Preparation and Selection Awards presented on Tuesday June 16, 2018 at the U. S. Department of Education.AP files/Michael Nelson Students hold a banner as they hold a demonstration calling on Gov.

Andrew Cuomo to sign a bill banning transphobic violence and violence against women, on Tuesday May 27, 2018 outside the UMass Amherst College in Amhers, Mass.AP Files/Matt Sayles Students walk during a protest against the death of Eric Garner, Jr. in New Bedford, N,v., Monday, Feb. 23, 2018 AP:Getty Students stand in front a mural of former President Barack Obama, with “Love trumps hate” above, during a campaign rally at the State Capitol in Nashville, Tenn., on Monday Feb. 22, 2018AP file file photo Students protest outside the United States Capitol in Washington, D.C., on Wednesday, Feb 1, 2018 to protest the Trump administration’s executive order banning travel from seven majority Muslim countries.APfiles/Andrew Burton Students march with other students during a march against President Donald Trump in Los Santos, Calif, on Wednesday Jan. 31, 2018.(AP file)APFile photo Students gather on campus as they participate in the ‘We Believe’ campaign at the United Nations General Assembly, Tuesday, Jan. 24, 2018 after the United Nation’s 193-nation Security Council adopted a resolution condemning Trump’s controversial executive order barring travel from predominantly Muslim countries.(AP photo: Mark Wilson)AP file/Paul Kinsey Students hold signs as they walk to their campus during the ‘Wake Up America Day’ rally in Los Gatos, Calif.(AP files)APFiles/Derek L. Hartmann Students walk in front as they attend the ‘The Trump Effect’ rally at UN headquarters in New New York on Wednesday May 18, 2018 as part of ‘The Donald Effect’ campaign.APFiles / Paul KinseyStudents gather for the ‘Trump Effect’ march outside the UN Headquarters in New Orleans, on Friday, May 16, 2017.(AP: Daniel Berehulak)Students march during the inauguration of President Donald J. Trump as he speaks during the 100th anniversary of the American Revolution in the National Mall in Washington on Saturday, May 18 in Washington.(AP Photo: Chip Somodevilla)Students gather on the steps of the Capitol as they march to the U