I wrote the first version of this book in 2007 to accompany my 200 hour yoga teacher training course. Since then it has been used by many training courses and revised several times, each time shedding some ideas I no longer felt were useful, and taking on new approaches according to my experience both in trainings and in my life. In this way it is like the ship of Theseus - a vessel that takes on new boards, masts and sails as it explores, until eventually none of the original ship remains. Whether it is the same or a different ship is a wonderful contemplation, and I suspect this manual will be again different in the years to come - but for now, I hope you enjoy it, as you are part of its journey.