#RIP Stephen Hawking. I have failed three times in my attempts to finish BRIEF HISTORY OF TIME. Sorry. I'll try again someday soon. When I'm smarter. Also it's incredibly inspiring what you've done with your time on this planet.
It is absolutely not your fault that you've failed to finish A BRIEF HISTORY OF TIME. The book makes no serious attempt at explaining most of its contents. If you'd like help with them, just ask. I'm a relativity theorist, and I spend most of my time explaining things.