[u2sonderzug]

I'm actually working on a CakePHP legacy app today and have experienced precisely what you are talking about (the lack of good material out there).

I am actually surprised at how CakePHP can be so popular, yet have so few books to support it.

Ruby and Python might be 'hipper' but with the numbers of people using PHP out there I am sure you would find demand would still be strong enough for something like this.

From a business/money making perspective - I'd assume that the market for Ruby, Python books is very crowded - but the competition doesn't seem strong at all for CakePHP.

[u2sonderzug]

Further more to this, how about an 'MVP' version of the book - write a chapter and see ifyou can get any interest in it and make a decision from there.