Growing book

Im starting to question the credibility of these grow books everyone keeps recommending. i bought one by Ed Rosenthal and it fails to mention alot of things i already know to be important...alot of things on lighting and nutrients...also it doesnt mention anything about flushing...in fact it says "during the last three weeks of flowering the fertilizer ratio should be low in N, high in P, and medium in K" is this book outdated or something...it also says HPS can be used throughout the whole life cycle of the plant...i thought this resulted in spindly long growth? and why does it go straight from feeding to cropping with no flush period? never mentions curing either...

I don't think any one resource is going to give you everything one needs to know. It's the collaboration of resources, including RIU, that will get you on your way to a great knowledge base.