The purpose of our books (in English and Spanish) is to demystify and 'defolklorize' the intelligent reader. Our thrust is to destroy the aura of mystery and incomprehensibility surrounding Relativity and Quantum Physics in particular as well as Science in general, unmasking and debunking the body of popular (and scientific) beliefs (many of them erroneous) which -by taking advantage of Einstein's popularity and prestige- have been used to validate preposterous assertions in fields like psychology, morality, spirituality, sociology, literature, art, etc. Felix's unique approach to teaching Science does not underestimate the intelligence of the layperson. Semantics and Epistemology are the key components which separate our books from the myriad of other popular-science books on Modern Physics.