Said author Uday Tara Nayar: "The title 'Substance & The Shadow' was suggested by Dilip saab. The 'substance' refers to the actual person behind the legend and the 'shadow' is the mythical image that has come to surround his persona."
"Substance And The Shadow" would be released in the presence of all the biggest actors and directors of Hindi filmdom.
Born as Muhammad Yusuf Khan, he entered filmdom with the 1944 release "Jwar Bhata" and after that he went on to give classics like "Madhumati", "Shaheed", "Devdas", "Andaz", "Amar", "Mughal E Azam", "Ram Aur Shyam", "Karma" and "Saudagar".
His last film was "Quila" in 1998.
The long-awaited biography, which traces the 91-year-old's life from birth, will be released at the elaborate function by Lata, who is likely to sing a few lines of Dilip Saab's favourite song "Allah tero naam".
"It's the song that Yusuf saab would ring up Lataji and ask her to sing whenever he was restless. She would always oblige her Yusuf Bhaiyya. Lataji came to visit Dilip saab recently. He immediately recognised her and exclaimed, 'Meri choti bahen mujhse milne ayee hai'.
"She fed him his evening meal with her own hands. Sairaji (Dilip Kumar's wife and yesteryear actress Saira Banu) just watched the historic moment. We both feel no person is as worthy of releasing the book as Lataji."
Shah Rukh Khan, whom Dilip saab and his wife regard as a son, won't be able to attend.
Aamir will recite a poem on Dilip saab's honour written by Prasoon Joshi.
Amitabh, who worked with him in "Shakti", is expected to speak about his regard for the thespian.
Another highlight of the evening would be the audio-visual showing rare never-seen intimate moments of Dilip Kumar's life with his wife and family.
Shedding light on the event, Nayar said: "It's been a 10-year journey to put together the authorised biography of Yusuf saab. We've finally done it. It couldn't have happened without the active support of Yusuf saab and Sairaji. They helped me piece together the life of a man who is not just the greatest actor in the country but also a father-figure for me."
Dilip Kumar was crowned the Tragedy King of Bollywood for playing doomed lover in films like "Andaaz", "Baabul", "Mela", "Deedar" and "Jogan".