The benefit is the price (free for students if read online) and availability of multiple formats for students. The book has exam/quiz supplements in Blackboard format as well as Powerpoint presentations. It may be an option to help reduce the cost of textbooks for students if the quality is reasonable. From what I can see the book is continuously being updated and quality is good.
Pricing for Books at Flat World Knowledge:
- Read Online- FREE
- Hard Copy (Color) - $69
- Hard Copy (Black & White) - $35
- Download a PDF to Read Offline and/or Print Yourself - $25
- Audiobook - $40
- Ebook (kindle, nook, ipad) - $25