SitePoint occasionally gives away ebooks of some of their publications. In the recent past, they have given away titles like "The Art & Science Of CSS" and "Firefox 3 REVEALED".For a limited time, they are offering a free eBook "The Principles Of Successful Freelancing" if you follow them on Twitter or provide your email address (they will email the link from where you can download the eBook).
The book has around 200+ pages & 8 chapters -
Chapter 1: Considering Freelancing?
Chapter 2: Prepare for the Transition
Chapter 3: Manage Your Money
Chapter 4: Set Yourself Up
Chapter 5: Win the Work
Chapter 6: Give Great Service
Chapter 7: Achieve Work–Life Balance
Chapter 8: Where to from Here?
Also see:
Startup 101 - free, online serialized book for first-time entrepreneurs
Giveaways
Building non-technical skills