Some readers of my blog has bought this book on Amazon. Upon closer inspection, I realised this is actually an excellent book for preparing for pattern recognition (visual discrimination) which is tested in GEP / DSA under the logic portion.
The above is a sample of what the book teaches. If you are familiar with the GEP / DSA test, this is exactly what the logic part of the test is about. Not just the GEP / DSA tests use this, basically any IQ test worldwide will test something like this.
Getting familiar with such tests will obviously be an advantage. No harm giving it some practice rather than seeing such tests the first time in the GEP / DSA test.
Pattern recognition is a skill that can be learnt, and one can argue that many intellectual activities like chess / math are just advanced forms of pattern recognition!