Generally speaking, you should head for the door at any sign of deception on the part of a teacher. Admittedly, you might want to make certain allowances for cultural differences and for the harmlessness of the lie.
Waking Up: A Guide to Spirituality Without Religion
It is a 2014 book by Sam Harris. Harris discusses a wide range of topics including secular spirituality, the illusion of the self, psychedelics, and meditation. He attempts to show that a certain form of spirituality is integral to understanding the nature of the mind.