Can you think of life without mobile phones or laptops anymore? Do you know how is electricity created? How did people manage to send long-distance messages when mobile phones were not invented? This Encyclopedia will answer these and more hows for you. Learning is made simpler with well-labelled diagrams and an extensive glossary of difficult words. Bonus: The book comes loaded with Isn’ t It Amazing— a section of fun facts to keep you glued for more.