The Constants and Equations Pages can only just scratch the surface when it comes to providing extremely specialised information. Although the site is becoming more and more comprehensive, books still provide some of the best information. The Constants and Equations Pages, in association with amazon.com, can now provide you with a selection of some of the best science, maths and astronomy books from Amazon's extensive 4 million title range. If the book you are looking for is not here, you have the opportunity to search through Amazon's whole catalogue for it. Many of the titles are available at substantially discounted prices and amazon.com guarantee that any credit card transaction is 100% secure.