He played high school basketball for Andre Agassi College Preparatory Academy ('15) in Las Vegas for two seasons.[1][3] Booker averaged 27.7 points per game at as a senior, leading the state in scoring.[6] He was named the Southern League Player of the Year both seasons, and a third-team all-state selection.[6]
College career
In 2015–16 Booker played basketball for Gillette College.[3] He averaged 11.0 points, 4.3 assists, and 3.4 rebounds per game.[7]
In 2016–17 he played basketball for the College of Southern Idaho.[3] Booker averaged 9.8 points, 6.4 assists, 4.4 rebounds, and 1.7 steals per game.[6]
In 2017–19 Booker played basketball for California State University, Long Beach ('19).[1][3] In 2017–18 he averaged 10.6 points per game, 4.6 assists per game (leading the Big West Conference), 1.5 steals per game (4th), and 94 turnovers (leading the Big West), with an .858 free throw percentage (2nd) and a .557 2-point field goal percentage (5th).[8] In 2018–19 he averaged 18.8 points per game (3rd in the Big West), 4.4 assists per game (3rd), 1.3 steals per game (8th), and 130 turnovers (leading the Big West), with a .912 free throw percentage (leading the Big West, and 3rd in the NCAA), and his 250 free throws led the NCAA.[8] In 2018 he was All-Big West Honorable Mention, and in 2019 he was Big West First Team, and Big West All-Tournament Team.[3] His career .897 free throw percentage is tops in the Big West, and 10th in the NCAA.[8]