The book has 24 chapters- one per hour. So brush up on your speed reading skills. The book has great code examples (but only for learning purposes, do not try to "borrow" code for anything real). It also has useful "tips" and "cautions" planted throughout the book. Below is the introduction from the book.
Each chapter (which represents one hour of learning) has a Q&A section at the end. I strongly encourage readers to not go on to the next chapter without spending time on it. If you don't spend time on the Q&As (like I tried to) you will find yourself having to go back to earlier chapters for reference more than you would care for. On this note, my disclaimer- I did *not* read the book in 24 hours straight but wanted to. Anyway, I heartily recommend the book to anyone who wishes to become proficient with NoSQL concepts along with a solid foundation of MongoDB. The book is available on Google Books for electronic download. Bon Appétit!