Desiraju (chemistry, U. of Hyderabad, India) and Steiner (crystallography, Freie Universitat Berlin, Germany) survey what is known about ... the interactions of weak and non-conventional hydrogen bonding. After an introductory discussion of the weak hydrogen bond in relation to hydrogen bonds in general, the discussion includes an analysis of a particular carbon-hydrogen-oxygen bond as the prototype of the entire interaction type, the extension of the analysis to a range of hydrogen bond donors and acceptors, the ways in which weak hydrogen bonds may be employed in supramolecular chemistry and crystal engineering, and how they influence biological structure and function. --SciTech Book News<br>