This book is not a mathematics text. It discusses various kinds of numbers and curious interconnections between them. Without getting into hardcore, difficult mathematical technicalities, the book lucidly introduces all kinds of numbers that the mathematicians have created. Interesting anecdotes involving great mathematicians and their marvelous creations are included. The intention is not to add to the problem-solving ability of the reader, who is rather expected to get a glimpse of the thought process behind invention of new mathematics. Starting from natural numbers, the book discusses integers, real numbers, imaginary and complex numbers and some special numbers like quaternions, dual numbers and p-adic numbers.