That is not a bad idea at all.,, It will be a lot of work but it could be done. Crowd sourcing might lead to the wikipedia-style schizophrenic-author voice of w

That is not a bad idea at all.,, It will be a lot of work but it could be done. Crowd sourcing might lead to the wikipedia-style schizophrenic-author voice of writing, though. See [1] for a prev discussion. Interestingly, if the book is organized so it is aligned to the common core math standard[2], it would make a killing in the US market since current textbooks are so bad. [1] https://news.ycombinator.com/item?id=7456397 https://news.ycombinator.com/item?id=7456397 [2] http://www.corestandards.org/Math/ http://www.corestandards.org/Math/