Buhari Returns to Abuja for Book Launch with Successor Tinubu
• Former President Buhari to visit Abuja on Tuesday for first time since handing over power to President Tinubu
• Visiting for book launch "Working With Buhari" written by former aide Femi Adesina
• President Tinubu expected to attend as special guest of honor
• Book launch marks first time Buhari and successor Tinubu appearing together
• Buhari has been in Kaduna and Daura since leaving office on May 29