I think the "Long term" successful traders are rare because everyone on earth will some how run out of luck one day. Those successful ones are unusally stop trading before their luck run out.
As for "Millionare Traders" tho, I don't know if it's good or not. One caveat, those 2 authors work for DailyFX, a division of FXCM. They have a vested interest in bringing in new traders so they may also be prone to understating the challenges of trading. I would approach it with skepticism, but haven't read it and can't say to the material itself.
Ignored
One ot the traders interviewed, Roland Campbell, is an active member of this forum. Rolandlc33. There are some success stories right here at FF.