Firstly, I would like to point out that "The Complete Book of Intelligence Tests" is NOT a book of IQ tests. Although this book does contain one "IQ test", it is primarily made up of a series of relatively short tests, each testing a different aspect of intelligence (for example, verbal intelligence, numerical intelligence and even creative intelligence and emotional intelligence).
My opinion of the tests varies from test to test. Some of the tests require very specific prior knowledge in order to get the answers correct (this is very much the case for the test of technical intelligence), which makes them knowledge tests rather than intelligence tests, and so, in my opinion they shouldn't have been included. In general, though, the tests do provide a good cross-section of the different types of questions you could expect on an intelligence test, and would provide good practice if you were planning on sitting such a test.
The biggest drawback of this book is that none of the tests in it are standardized. At the end of each test there are grade bands which tells you whether you are average, very good, exceptional, etc. However, even on the IQ test, there is no way to convert these numerical grades to an IQ figure. If you are looking for a book that will allow you to calculate your IQ then you should try Test Your IQ. Without a conversion chart to convert grades to IQ, this book can only give you a ballpark idea of the level of your intelligence and as a result, should not be able to call itself "complete".