It is all about one person’s life, a scientist, an actor, a painter, a writer, a politician, an astronaut, a musician & etc. The reason for writing a biography book is illustrating that a person is special, he or she did something valuable on a scale of the whole world, and inspired people decided to combine together his lifelong story with his contribution and personal qualities. It is really important to understand why this person in the book is special. For instance, all of us know who is Mendeleev, his Periodic Table of Elements & lots of chemistry paper works. That person gave a basement for the future of chemistry and inspired thousands of people to study it, and many people are willing to know how one person can make such a great invention. That is the main reason for having a biography book in a home library. It is also the reason why educational units assign students to write a biography book report, which is not always an interesting thing to do. Biography book report can be perceived as a summary of someone’s life. Nowadays, it is much easier to collect biographical information from social media and internet resources, but imagine how hard was it to complete the puzzle few centuries ago. It was extremely hard for scientists to collect all the data about great people of the past, especially, if we consider mental differences, and that is why background of people from the past can be hard to understand for a modern person. It is also the reason of why educational system demand you to write reports and essays about different people in the past, even if you have a history subject in your program.