Omaha information/books, question about specific books

[p_h_c]

Recently I started playing Pot Limit Omaha. As I would like to improve my game, I wanted to ask the following:

1) Is the PLO-section in "Play Poker like the Pros" any good? Or is it just as flawed as the Holdem Limit one?

2) What about the PLO text in SS2? Can u recommend it?

3) What other books are a must read for a beginner, apart from Slotboom's?"

4) Where can I find useful Omaha information (articles, videos ...) online? (except from here of course)

Thank you.