Bachchan, 72, who launched the book written by Amjad's son Shadaab, said he recollected the memories of his first meeting with the late actor on the sets of the 1975 blockbuster.
"... A journey filled with happiness and joy and togetherness and trying times and difficult times. But the intensity of our friendship always remained.
"We spent some anxious times at various stages of our friendship... His accident, my accident and then his sudden passing away but there was a bond that remained unspoken between us and still does...," he wrote on his blog.
Besides "Sholay", the actors shared screen space in "Ahsaas", "Suhaag", "Mr Natwarlal", "Laawaris" among others.
The "Piku" star is all excited about his son Abhishek Bachchan's team's opening game in the second edition of the Pro Kabaddi League, where Big B will also make an appearance.
"BUT .. Among all this the celebration for the ProKabaddi continues and it starts on the 18th... With Abhishek's team Jaipur Pink Panthers playing the opening game with Mumbai .. and a sort of special appearance by yours truly on the day...," Bachchan added.