Tim,
Your book sounds like an awesome reference.
Just an idea - if you don't end up getting a publisher (although I can't see why not) you could always self-publish with one of the online companies out there. There are some that do offer ISBN so your book will be on a big online bookseller's list. (I'm not naming names as I am not sure if that is allowed here.) I have been looking into it myself. Then advertise here and sell your book directly to BYCers and such. Some companies you only need to order one at a time and people can purchase from their website, you choose your price, etc., others you order a quantity, then sell.
Regarding ISBN, some companies you own your ISBN (purchase it outright), others it is still owned by the companies, so not as much control over your work.
Hope this helps.
Your book sounds like an awesome reference.
Just an idea - if you don't end up getting a publisher (although I can't see why not) you could always self-publish with one of the online companies out there. There are some that do offer ISBN so your book will be on a big online bookseller's list. (I'm not naming names as I am not sure if that is allowed here.) I have been looking into it myself. Then advertise here and sell your book directly to BYCers and such. Some companies you only need to order one at a time and people can purchase from their website, you choose your price, etc., others you order a quantity, then sell.
Regarding ISBN, some companies you own your ISBN (purchase it outright), others it is still owned by the companies, so not as much control over your work.
Hope this helps.