This book really terrible lil l!! A good book for anyone discovering the world of scne but also for those who need paufiner the use of effects and other hack who does not like math! I use it often in practice and if the good advice of the author are valid and well explained! Trs good layout and many are near THEME! Finally a book that I do not regret having bought how much? Uh ... I do not know DSOL but not too much you worry! A pretty good ten MRIT You decide: Raph