In July 2018, Booker signed with
ALM Évreux of the French
LNB Pro B. In 29 games for the team, he averaged 8.7 points in 21.6 minutes per game. On 29 August 2019, Booker signed with
Úrvalsdeild karla club
Valur, the same team his father played for from 1991 to 1994 and led to the Úrvalsdeild Finals in 1992. After a rough debut where he scored 7 points on a dismissal 2 of 14 shooting in a narrow win against
Fjölnir, Booker bounced back in his second game, scoring a team high 25 points and connecting on six of his three point shots in a victory against
Þór Þorlákshöfn. Booker averaged 15.3 points, 3.7 rebounds, 2.3 assists and 1.6 steals per game in 2019-20. After sitting out the first half of the
2021–2022 season due to injury, Booker signed with
Breiðablik in January 2022. He appeared in 10 games for Breiðablik, averaging 6.1 points and 2.6 rebounds per game. In September 2022, Booker signed back with
Valur. On 2 October 2022, he won the
Icelandic Super Cup with Valur. On 14 January 2023, he won the
Icelandic Cup with Valur after the team defeated
Stjarnan in the Cup final. On 24 September 2023, he won the
Icelandic Super Cup again after Valur defeated Tindastóll 80–72. On 22 March, he scored 20 points in Valur's 96–78 win against KR in the Icelandic Cup finals. On 26 April 2026, Booker broke his left
patella in game two of Valur's semi-finals series against top-seeded
Grindavík, forcing him to miss the rest of the playoffs. ==National team career==