Hitchhikers guide

My book the hitchhikers guide to the universe has gotten a whole lot better. I still don't understand a lot of the space mumbo jumbo but I'm getting better. So far in the book, this guy Arthur is about to have his house ran over to make a bypass. Arthurs friend who isn't actually human comes and informs him of an alien attack on Earth. The two of them quickly "hitch" a ride from a passing by spaceship and go off. Arthur coincidentally finds his ex-girlfriend on this ship, and too our knowledge these are the only surviving humans. Right now they're still on the ship, and it seems to be setting up for something big. The writing style of the book is my favorite part, because it is so simple, yet he makes the word choice and fluency so complex. He writes of a new character and then quickly lists off the characters characteristics. Also, he goes on certain sidetracks, and seems to fall off topic for multiple pages at a time, which I will be the first to say, can get annoying.