If you have ever attempted to 'follow your passion', or envied people you assumed were following their passion, this is a must-read. Based on numerous interactions, Cal proves that following passions isn't the best life route to take. What's even better, is how Cal has written the book. Often, when explaining not-so-simple concepts, a lot of books just go through them in a checklist manner. Cal regularly stops to summarise, even revisiting some points several times in the book. By way of this, even if it seems a little repetitive or verbose to readers, his intent to drive the learnings around his findings is unquestionable. In all, a very useful read.