Booker, who scored 44 points against the Sacramento Kings on Monday, added 26 of his 51 points in the third quarter, including making five-of-five from three-point range.
It was the fourth 25-point quarter in Booker's career, tied with Kobe Bryant for second most in the past 25 years.
Booker shot at 80 per cent from the field, making six-of-seven from three-point range, while he also added four rebounds and six assists before sitting out most of the final quarter.
It marked Booker's fourth career 50-point game, which is the most in franchise history.
Suns center Deandre Ayton contributed 30 points with 14 rebounds and two blocks as Phoenix improved to 15-6.
The Bulls fall to 9-12, with DeMar DeRozan top scoring with 29 points with seven rebounds.
Tatum stars in front of royals with 49-point haul
The Celtics small forward scored 28 of his points in the first half, which is the most in any half this season, while he also had 11 rebounds, three assists and two assists. Jaylen Brown added 26 points with seven rebounds in a game attended by the Prince and Princess of Wales, who sat courtside.
Tatum brought up his fifth 45-point game, which is second behind Larry Bird (19) in Celtics history, having moved ahead of Paul Pierce (four).
Hot Nets above .500 for first time this season
Durant managed a game-high 39 points on 13-of-20 shooting with five rebounds and five assists, while Kyrie Irving added 15 of his 27 points in the final quarter.
The win improved the Nets to 12-11, moving above .500 for the first time this season on the back of three straight wins.