This is Allie Brosh.
You’ve probably seen her webcomic if you spend any significant amount of time on the Internet.
She wrote a book with the same title of her blog and then a long subtitle. You can buy Hyperbole and a Half: Unfortunate Situations, Flawed Coping Mechanisms, Mayhem, and Other Things That Happened on Amazon.
And watch Allie read new content from aforementioned book, including a story in which a 10-year-old Allie writes a letter for a 25-year-old Allie, right here.