Gareth Roberts

Inside this book is another book - the strangest, most important and most dangerous book in the entire universe. "The Worshipful and Ancient Law" of Gallifrey is one of the Artefacts, dating from dark days of Rassilon. It wields enormous power, and it must not be allowed to fall into the wrong hands. Skagra - who believes he should be God and permits himself only two smiles per day - most definitely has the wrong hands. Beware Skagra. Beware the Sphere. Beware Shada.

The Doctor takes Romana for a holiday in Paris - a city which, like a fine wine, has a bouquet all its own. Especially if you visit during one of the vintage years. But the TARDIS takes them to 1979, a table-wine year, a year whose vintage is soured by cracks - not in their wine glasses but in the very fabric of time itself. Soon the Time Lords are embroiled in an audacious alien scheme which encompasses home-made time machines, the theft of the Mona Lisa, the resurrection of the much-feared Jagaroth race, and the beginning (and quite possibly the end) of all life on Earth. Aided by British private detective Duggan, whose speciality is thumping people, the Doctor and Romana must thwart the machinations of the suave, mysterious Count Scarlioni - all twelve of him - if the human race has any chance of survival. But then, the Doctor's holidays tend to turn out a bit like this. Featuring the Fourth Doctor as played by Tom Baker, City of Death is a novel by James Goss based on the 1979 Doctor Who story written by Douglas Adams under the pen-name David Agnew. City of Death is one of the best-loved serials in the show's 50-year history and was watched by over 16 million viewers when first broadcast.

Equipped with space suits, golf clubs and a flag, the Doctor and Rose are planning to live it up, Apollo mission-style, on the Moon. But the TARDIS has other plans, landing them instead in a village on the south coast of England; a picture-postcard sort of place where nothing much happens. Until now...An archaeological dig has turned up a Roman mosaic, circa AD 70, depicting mythical scenes, grapes and a Dalek. A few days later a young woman, rushing for work, is knocked over and killed by a bus, then comes back to life. It's not long before all hell breaks loose, and the Doctor and Rose must use all their courage and cunning against an alien enemy and a not-quite-alien accomplice who are intent on destroying humanity. Featuring the Doctor and Rose as played by David Tennant and Billie Piper in the hit Doctor Who series from BBC Television.

Taking a "music first" approach, Gareth E. Roberts's From Music to Mathematics will inspire students to learn important, interesting, and at times advanced mathematics. Ranging from a discussion of the geometric sequences and series found in the rhythmic structure of music to the phase-shifting techniques of composer Steve Reich, the musical concepts and examples in the book motivate a deeper study of mathematics. Comprehensive and clearly written, From Music to Mathematics is designed to appeal to readers without specialized knowledge of mathematics or music. Students are taught the relevant concepts from music theory (notation, scales, intervals, the circle of fifths, tonality, etc.), with the pertinent mathematics developed alongside the related musical topic. The mathematics advances in level of difficulty from calculating with fractions, to manipulating trigonometric formulas, to constructing group multiplication tables and proving a number is irrational.Topics discussed in the book include Rhythm Introductory music theory The science of sound Tuning and temperament Symmetry in music The Bartok controversy Change ringing Twelve-tone music Mathematical modern music The Hemachandra-Fibonacci numbers and the golden ratio Magic squares Phase shifting Featuring numerous musical excerpts, including several from jazz and popular music, each topic is presented in a clear and in-depth fashion. Sample problems are included as part of the exposition, with carefully written solutions provided to assist the reader. The book also contains more than 200 exercises designed to help develop students' analytical skills and reinforce the material in the text. From the first chapter through the last, readers eager to learn more about the connections between mathematics and music will find a comprehensive textbook designed to satisfy their natural curiosity.