A very nicely produced book - but with some substantial flaws.
The text is often rather dull and plodding - description with too little evaluation, and there is too little connection of CG with the major trends and principles, after the summary of theory in Ch 2. Mallin seems to approve of CG in all its forms, too little criticism.
This is a fair attempt at description, but this should be more critical and more analytical. There is little attempt to compare or evaluate the international systems, for example. The USA is not covered separately, which is strange considering that it is the strongest current influence on the UK, but in some respects is quite different from the British tradition.
Again, lots of sources and codes are mentioned, but next to no evauation is made of them. Mallin seems to think that CG is pretty good and is steadlily getting better. A very optimistic view.
Also, a separate chapter on finanical instituitions might be wise, given that their regulation has become quite different. Also, including some of the thinking from managerial economics would be beneficial.
Mallin should probably take on a co-author for the 4th edition.