डॉ. अब्दुल कलाम यांनी खालीलपैकी कोणते पुस्तक लिहिले?

'The Life Tree' is a collection of poems by Dr. A.P.J. Abdul Kalam. 'Imagining India' and 'Rebooting India' are by Nandan Nilekani, and 'Untouchable' is by Mulk Raj Anand.