Unknown Quantity

Unknown QuantityBy: John Derbyshire 'Here is the story of algebra.' With this deceptively simple introduction, Unknown Quantity opens, thirty eight centuries ago, at the time of Abraham and Isaac. In stylish and accessible prose, Derbyshire shows how the invention of algebra was more than the beginning of a specific discipline of mathematics; it was also the birth of a new way of thinking that altered, forever, the ways in which we see and understand our world.

Cian was changed by Lilith centuries ago

For Syndulla and Isval

timeless classic

is short lived

In Becoming Sugar-Free

◎ 當卡關的時候，可以參考「提示卡」的三個提示，一步步獲得更多解謎的關鍵訊息。

By: Peter David

" --Washington Post Book World

running isn't an option anymore because Dawg's got a plan to get her and keep her

so that readers can understand the world around them

the mysterious rotting horror with hidden ties to Peter Parker's past and a violent desire to punish him for the death of Gwen Stacy

a political treatise