Since this is one of the first results coming up on Google while searching for the book, I believe it might be useful for the casual Internet zapper to know that the third edition is out now (April 2015) in Europe and will be soon out in the US. The book is some 250 pages bigger than the previous edition and a sample chapter (9: Voltage regulation and power conversion) along with the detailed table of contents is available online (you can have it emailed from Cambridge University Press, or find a copy in someone's Dropbox account - hey, it's the sample chapter, not the book!).
The above chapter has massively changed from the previous edition.
In the third edition, the chapters are now
2. Bipolar transistors
3. Field effect transistors
4. Operational amplifiers
5. Precision circuits
7. Oscillators and timers
8. Low noise techniques and transimpedance
9. Power regulation
10. Digital electronics
11. Programmable logic devices
12. Logical interfacing
13. Digital meets analog
14. Computers, controllers, and data links
Looking at the detailed ToC it appears some chapters have been split (Filters and Oscillators, for example) while others have been rehashed. Some others appears to have been dropped. In an email by W. Hill shared online, it appears that some five further chapters are still in preparation as additional 'modules' (perhaps only in electronic form? It's not clear to me)
All in all, it appears the third edition is a brand new book, with the 'basic chapters' still the same, but most 'application chapters' profoundly revised in content and depth.
So, if you - Internet zapper - stumbled upon this page by chance, my advice to you is "go for the third edition".
And I have the second edition sitting on my shelf.