The book is what its called, a guide to the Number Sense Test. It has all the tricks that you will need to ace the test. On top of that, it has practice tests every few chapters to quiz you to make sure that you aren't forgetting older tricks. The book will be updated with new tricks as needed.

Note: For optimal use, make sure to download the PDF of the book. For some reason, some of the links don't work unless you download it. 

You can access the book here. Enjoy! 

Here is a completely anonymous feedback form for the book. You can also submit book ideas and any other suggestions you might have.