Liquid Crystal Sensors discusses novel applications of liquid crystals that lie beyond electrically driven optical switches and displays. The main focus is on recent progress in the area of sensors based on low molar mass and polymer liquid crystals. The book is well written and illustrated, even if colour figures are restricted to a section in the centre of the volume. The chapters are to a very large extend extensively referenced, so that the reader will find it easy to accumulate more detailed information if desired, although one may get the impression on occasion that very recent publications on some of the topics possibly have been omitted. In any case, this is a worthwhile volume of the Liquid Crystals Book Series by CRC Press, which provides an interesting overview about different aspects and possibilities of sensing with liquid crystal based devices. - Ingo Dierking Liquid Crystals Today