After reading a rather scathing review posted on Amazon.com entitled "Get an editor" I chose not to order this book. Later, I happened across the book at Borders, thumbed through and purchased it. The book is is excellent!
I believe the review misleads readers. I will address the two specific criticisms: Bad chemistry? Resh very carefully explains the concept of PH ( the reviewer missed this)-reference to a PH of 4.0 as very acidic was relative to the PH needs of tomatoes and, in fact, 4.0 is very acidic for a tomato (just a fact of life, not bad chemistry). Sulphuric acid for novices? Resh talks about sulphuric acid/hydroxides because they are, indeed, used within hydroponics (see hydroponic supply web sites). However, he is very clear that he does not recommend their use and lists the same reasons given by the reviewer (somehow the reviewer overlooked this also).Resh goes on to recommend specific safety measures for those who insist on their use.
The book is clearly written, well illustrated and extremely practical. I have read it twice and highly recommend it.