This book is full of sources, videos, audio files, and several interactive parts (small games). Make sure to go through them all in order to enjoy and understand this journey. This book should be read in its online format on tromsite.com, else none of the above will work and the book will be incomplete. It is really impossible to explain this subject without the help of such media materials. If you read it in any other format it is like you’re eating frozen food - though still nutritious, it would be tasteless. Take your time and enjoy this massive accumulation of knowledge. Have ‘phun’!