The book will comprise a detailed examination of faults and flaws that can impact upon the quality of wines. There are some faults that render wines unsaleable and undrinkable and others that have a negative effect upon quality and enjoyment. Each fault is discussed as follows: 1. What it is, in basic terms 2. How is it detected by: a) sensory recognition; and b) laboratory analysis 3. What is the cause? 4. At which stage/s of production, maturation or storage can it occur? 5. Can it be prevented? 6. Can it be rectified? 7. Detailed science including research Each topic will be examined in both practical and scientific terms. There will also be discussion of detection of faults by tasting and laboratory analysis, and good practice in the vineyard and winery to prevent faults from occurring.