For years, electricians have relied on Whitfield's book. Unlike other publications, it does not assume that readers are fully conversant with electrical theory. This 4th Edition covers the latest Amendment 3:2015. It also benefits from the expertise of the co-author, Andrew Hay-Ellis (an established author + Chief Examiner at C&G;).
John Whitfield Livres





Time Jack
- 372pages
- 14 heures de lecture
Calvin Thompson spent countless years mastering the field of Time Travel Technology and just when he is finally about to become the first official time traveler, a jealous co-worker, Eric Seabright, sends him back in time to the year 1831 in the deep south at the height of slavery. With 4 months to make it to a Backlash zone (a safety component within the Time Machine that may transport him back to the future), Calvin struggles to overcome slavery, futuristic hit-men, and the demons inside of him that will not allow him to love and appreciate the people who are indispensable to his survival, his humanity and the victory of his journey.
Published in 1711, this sermon by Samuel Butler argues for the importance of individual liberty in matters of conscience and religion. It is a powerful defense of religious toleration that remains relevant today.
Lost Animals: Extinct, Endangered, and Rediscovered Species
- 224pages
- 8 heures de lecture
Explore the fascinating world of extinct animals, highlighting the various causes behind their disappearance, such as competition, mass extinctions, hunting, and human impact. This book delves into the stories of these incredible creatures, shedding light on their unique characteristics and the environmental changes that led to their extinction. Through vivid descriptions, readers will gain insight into the importance of biodiversity and the consequences of human actions on wildlife.
Lost Animals
- 224pages
- 8 heures de lecture
Documenting the species that have emerged, disappeared and been reborn over the millennia since the Cambrian Explosion, Lost Animals is the story of life on Earth.