What's your sign? Are you an introvert or an extrovert? Is Mercury in retrograde? Or is it just your personality? The Who Are You? series takes a closer look at the most popular personality theories from star charts to numerology to psychology assessments. This hi-low series uses considerate text written at a higher maturity level with a lower reading level to engage struggling readers. A table of contents, glossary with simplified pronunciations, and index all enhance comprehension.