National Institute of General Medical Sciences
This booklet from the National Institutes of Health’s National Institute of General Medical Sciences describes basic chemistry and biochemistry research that spurs a better understanding of human health. It is available in e-pub (http://publications.nigms.nih.gov/epubs/ChemistryofHealth.epub) and PDF (http://publications.nigms.nih.gov/chemhealth/coh.pdf) formats.
Read this work at the World Public Library (library card needed).