Since the use of high-precision/resolution spectroscopy is closely connected to the ability to collect a large number of photons, the scientific domains using this technique benefit tremendously from the use of 8-meter class telescopes and will fully exploit the tremendous gain provided by future Extremely Large Telescopes (ELTs). This volume comprehensively covers the astrophysical and technical aspects of high-precision spectroscopy with an outlook to future developments.

Ten years after the ?rst ESO Workshop on light elements, and ?ve years after the IAU in conference in Natal (Brazil) on the same subject, we felt that it was time to have a new conference on this topic: a wealth of new observational data have become available from the 8-meter telescopes and in particular from the VLT, and, at the same time, in the last years new theoretical roads have also been inaugurated in the interpretation of the stellar data. It soon became clear, on the other hand, that in order to understand the evolution of the fragile Li and Be in stars and in the Galaxy, the whole...