What is the author's tone in Dry by Augusten Burroughs?

Augusten Burroughs is the author and first-person narrator of the nonfiction book, Dry. In his narrative, Augusten uses a first-person point of view, which allows him to take a very casual tone with the reader as he narrates his struggles with alcohol as an advertising executive in his early twenties in New York City. For the most part, the experiences he is describing are very serious, and he sometimes contemplates his frame of mind and how he feels about other people and things.