As I mentioned in another thread: the burnham system works for me. It is extremly concise and I did not need any additonal material. It is quite costly though - prices are $300 each package...unfortunately.

Hi guys, I have the following problem: I really enjoyed my time preparing for the 520 exam which I passed on June 15th on first attempt. I would love to continue....but my employer does not think it is really relevant and therefore does not reimburse any of the cost. In order to prepare for the 520 ...