Calculus 1 is a easy to follow "book" that covers the basic fundamental techniques and topics in calculus that an engineer must master. It is based on the first year calculus course taken by engineers are Canadian universities.
Just like every other book and resource in this website, this book may contain errors, and its users responsibility to double check. Round Pi can not be held responsible for any loss due to errors in this book. This is marely to get you started in calculus.