As he did so masterfully in Prime Obsession, Derbyshire brings the evolution of mathematical thinking to dramatic life by focusing on the key historical players. Unknown Quantity begins in the time of Abraham and Isaac and moves from Abel's proof to the higher levels of abstraction developed by Galois through modern-day advances. Derbyshire explains how a simple turn of thought from this plus this equals this to this plus what equals this? gave birth to a whole new way of perceiving the world. With a historian's narrative authority and a beloved teacher's clarity and passion, Derbyshire leads readers on an intellectually satisfying and pleasantly challenging historical and mathematical journey.

    Harris.Elephant has a bucket of blocks and wants to build something tall. Something as tall as Elephant. But will it stay up? CRASH! BOOM! Not this time. Build it again? One block. Two blocks? Four blocks? It's still not as tall as Elephant. More blocks! Now will it stay up? Now will it be as tall as Elephant? Build, balance, count -- question, estimate, measure -- predict, crash, and build again! Young children will happily follow along as Elephant goes through the ups and downs of creating something new and finally celebrates the joy and pride of success.

    Based on the remarkable story of `The U-boat that lost its Nerve'(formerly a radio play by James Follett) , U-700 is an account of the surrender of a U-boat (actually U-570) to an RAF Hudson during World War II and the subsequent illegal court martial of the U-boat's first officer by his fellow officers in a POW camp.

    When her favourite writer, Peter Lovesey, is due to appear at the Emirates Literature Festival, she is beyond thrilled. What will she do then when her husband changes their plans at the last minute?

    How far will Solen go to keep her safe from the opposing forces, as well as the members of his own army?

    

    No Dork Diaries collection is complete without this boxed set of Dork Diaries #7, #8, and #9!Books seven, eight, and nine in the wildly popular New York Times, USA TODAY, and Publishers Weekly bestselling Dork Diaries series are all available in one dorktastic boxed set!This boxed set includes Dork Diaries 7: Tales from a Not-So-Glam TV Star, Dork Diaries 8: Tales from a Not-So-Happily Ever After, and Dork Diaries 9: Tales from a Not-So-Dorky Drama Queen.

    S. Parker for your reading pleasure.Four complete series included plus Book 1 of the upcoming MS Parker series, Dom X. Only available for a limited time.Get lost in the sexy world of MS Parker tonight.The series include: Dom X - Book 1, Sinful Desires Book 1 - 5, Casual Encounter Book 1-5, Twisted Affair Book 1 - 5 and Exotic Desires Book 1-3