The aptitude book is slightly dated but neverless offers good practice for all the arithmatic and spatial reasoning questions we'll be tested on...
I don't sit my tests until the 31st March but I believe the type of tests we will sit are as follows:
- Numerical Reasoning (30 questions in 10 mins)
- Spatial Reasoning (40 questions in 20 mins)
- Diagrammatic Reasoning (40 questions in 20 mins)
- Data Checking (40 questions in 5 mins)
- Motivation Paper (30 questions in 20 mins)
- Personality Questionnaire (248 questions)
Just get as much practice as you can...and as for books, look on Amazon pre-owned or eBay for the cheapest prices.
Good luck!
Kirk