Pi Day - free Kindle download (+ t-shirts)

March the 14th is, of course, Pi Day (3/14 in the way our American cousins write the date numerically).

What better way to mark the event than to either:

Download a free ebook for your Kindle (free until Friday only!) that shows the first one million places of Pi so you can try to learn it off by heart:



Or, to buy a stylish Pi Day T-shirt or hoodie (available in customisable colours!).

Have a great Pi Day - however you celebrate the occasion!