As quoted from the LWN review of the book:

Open Advice is a book that will be helpful to those who are new to FOSS, but, because of the individual voices, styles, and tones, it doesn't read like a "how to". It could even be recommended to those who aren't necessarily interested in contributing, but are curious about what this "free software thing" is all about.

It contains real experience from real developers that work on FOSS projects with chapters titled:

• "Code First"
• "University and Community"
• "Love the Unknown"
• "Quality Assurance"
• "Good Manners Matter"
• "Stop Worrying and Love the Crowd"

The book is licensed under a Creative Commons license (CC-BY-SA) and can be downloaded in multiple formats - ePub, mobi, PDF and paperback, if you prefer that.