G.Low, author of Integral Hydroponics, has informed me that his book has been effectively discontinued. This comes not long after the third edition was published during 2007. Integral Hydroponics was a how-to guide for beginner and intermediate level hydroponic gardeners with much of it's information specific to the challenges faced by individuals from Australia. While I can only attest to the content found in the second edition, the fact Integral Hydroponics was written specifically for Australians was arguably it's most unique and likable feature.