“Heart disease is the leading cause of death in the developed world” (p. v). With that very first sentence in the preface, the authors succinctly state the need for this reference book. The Institute of Medicine confirms and expands upon that assessment in naming cardiovascular disease an epidemic and among the leading causes of death globally [1]. Heart disease is more varied and complicated than librarians or the lay public may at first realize. This work defines the many types and points readers to vetted, reputable information. The Medical Library Association Guide to Finding out about Heart Disease is a librarian's resource that will also serve the public well as a global positioning system (GPS) for finding trustworthy sources in the landscape of the Internet's interminable purveyors of opinion. The book is intelligently arranged with logical, consistent organization of chapters, an index, and a glossary. Along with prompts to conduct a high-quality reference interview, the authors are careful to repeatedly remind readers to consult with doctors or other health professionals. The first chapter offers introductory instruction on how to most effectively use the book. Because this is a reference book that one dips into for specifics, many readers will likely skip this first chapter, but librarians should not. It points to the key, broad resources that the authors used as major sources as well as strategies for searching in an ever-changing web environment. Chapter two, “How the Heart Works,” introduces readers to the language of heart disease, sorting out key elements of the heart system that readers need to know to understand what they will read. The chapter does not go into so much depth that it becomes drudgery; instead, it offers brief, one- to three-paragraph explanations—no more than a reader needs to know to feel like the language of heart disease can be understood by a nonmedical person. Subsequent chapters cover specific diseases or disorders, tests and treatments, risk factors, and preventive measures. The final chapter on “Heart Disease in Women” is especially important as women's symptoms often do not present in the same manner as men's [2,3]. Many people, when faced with a sudden, potentially life-threatening disease, turn to the Internet with their questions. Unfortunately, as the amount of available information grows exponentially, consumers frequently cannot distinguish promotional copy from research evidence. This book fills that gap. The two authors are medical information specialists who have vetted the sources for credibility. Most sources named are websites, which is logical and useful as that is where consumers turn to for current information. The Medical Library Association Guide to Finding out about Heart Disease is a timely response to the Institute of Medicine's report on Promoting Cardiovascular Health in the Developing World: A Critical Challenge to Achieve Global Health. Like other Medical Library Association Guides (to cancer information, health literacy, and so on), this book offers specific, targeted, and vetted information resources in one specialization of medical care. Finding out about Heart Disease is primarily recommended for medical libraries, hospital libraries, and public libraries. This is probably not a book for cardiologists, as it is written in plain English and targeted to nonphysicians; however, because heart disease is so pervasive, it would be a highly useful desk reference for medical and allied health professionals in specialties other than cardiology. Certainly, it would be highly useful to the general public: it is a road map to vetted, consumer-friendly information for anyone with a loved one with some form of heart disease. The book is also available in portable document format (PDF), ePub format, and Kindle format. Any of the electronic formats would likely be more useful than the print edition because so many of the resources are web-based and would be hyperlinked and clickable in electronic formats.