Background on The Last Lecture:
The Last Lecture, cowritten by Randy Pausch, a computer science professor, and Jeffrey Zaslow, a reporter, is actually based on an inspirational lecture given by Randy Pausch.
Diagnosed with terminal pancreatic cancer, Randy Pausch dedicated his "last lecture" to a reflection on what really matters in life. Pausch delivered his last lecture, "Really Achieving Your Childhood Dreams," to his friends, students, family, and co-workers at Carnegie Mellon University in 2007. His lecture received attention and praise from the media, and the book was published in 2008.
Tying in tone:
According to literarydevices.net, tone, in written composition, is the writer's attitude toward a subject or an audience. Generally, an author conveys tone through their choice of words.
The book is written with humor and wisdom and outlines the points Pausch made in his "last lecture" at Carnegie Melon. Because of this, the tone can be characterized as reflective. In a reflection of his own childhood experiences and dreams, Pausch emphasizes the importance of childhood dreams in everyone's lives, and also comments on ways to achieve those dreams as we grow into adults.
I have attached a video of Pausch's lecture.