![Matt Parker on Twitter: "If you pre-order Humble Pi on @MathsGear now you'll get a signed first-edition hardcover copy. https://t.co/14HsrxvGMX https://t.co/jqkqJccGUB" / Twitter Matt Parker on Twitter: "If you pre-order Humble Pi on @MathsGear now you'll get a signed first-edition hardcover copy. https://t.co/14HsrxvGMX https://t.co/jqkqJccGUB" / Twitter](https://pbs.twimg.com/media/Dnn-du5XoAAsCVp.jpg)
Matt Parker on Twitter: "If you pre-order Humble Pi on @MathsGear now you'll get a signed first-edition hardcover copy. https://t.co/14HsrxvGMX https://t.co/jqkqJccGUB" / Twitter
![Matt Parker on Twitter: "Oh dang, Amazon have set my book Humble Pi to 99p for one day only. That's under 0.0012p per word! https://t.co/EqoqqF7Rzi https://t.co/H9HWgUWPxi" / Twitter Matt Parker on Twitter: "Oh dang, Amazon have set my book Humble Pi to 99p for one day only. That's under 0.0012p per word! https://t.co/EqoqqF7Rzi https://t.co/H9HWgUWPxi" / Twitter](https://pbs.twimg.com/media/Fm2JnokXkAE-u1O.jpg)
Matt Parker on Twitter: "Oh dang, Amazon have set my book Humble Pi to 99p for one day only. That's under 0.0012p per word! https://t.co/EqoqqF7Rzi https://t.co/H9HWgUWPxi" / Twitter
![Humble Pi by Matt Parker review – a comedy of maths errors | Science and nature books | The Guardian Humble Pi by Matt Parker review – a comedy of maths errors | Science and nature books | The Guardian](https://i.guim.co.uk/img/media/6a9b3e3d6830095643b325300c3cdb77b4f9f14f/36_0_1993_1196/master/1993.jpg?width=1200&height=900&quality=85&auto=format&fit=crop&s=6623b6170f60f2838677fd205a442f6f)