This unique, first of its kind, book offers an integrated treatment of the atomistic-continuum behaviours of single and interacting microdefects under elasto-static loading. These microdefects may take the form of nanocracks, microcracks, microvoids, inclusions, and inhomogeneities. Professor Meguid elucidates the subject matter using novel treatment that offers a fresh look at molecular and continuum mechanics, imperfections in solids, the Griffith crack, modes of failure and diagnostics at varied length scales, LEFM and multiscale modeling of interacting microdefects. Providing a range of perspectives from theory and applications, this book is ideal for college seniors, graduate students, practicing and research engineers interested in failure analysis, diagnostics and prevention.