I found Phil Gordon's Gold Book fairly good (plus the book is also good in other senses for the improving player, including 3betting, 4betting, cbetting, etc, all in combination with your HUD).
It's funny you mention 'The Little Gold Book' . I checked it out at the library about two months ago when I first started playing again. I realized quickly it deserved much more than a one week borrow from the library. So I bought it. I took detailed notes on the whole thing, it has really helped to guide my current play. Like you said it covers 3bet and 4bet really well. And was basically the reason I started PT3.

I'm glad to hear someone in the forum mention it, as I was going to sooner or later and ask if anyone had read it.

It has really helped me a lot. I've only deposited once about a month and a half ago. I put $30 bucks on lock, would have like to put more on but my current financial situation, and my wife wouldn't allow it. I went on a horrible downswing the last two days. I know now why you should have 20 buy-ins for the level your playing. I'm wayyy down, but ill build her back up. I'm playing as much as I can , and doing at least an hour of PT3 analysis at night. I have all intentions of beating 4nl by summers end, I know with your guy's help I can do it, and then move on. If I had the roll I could probably beat 10nl , but you can do with what ya got. right?