At least one of the publishers thoughtfully sticks (or at least used to) the pictures of all the authors on the front cover. Finding people that have both the

At least one of the publishers thoughtfully sticks (or at least used to) the pictures of all the authors on the front cover. Finding people that have both the time and knowledge to write about a particularly in-demand technology is difficult, I had a publisher I particularly respect approach me to write about SQL Server + XML years ago and I just didn't have the time ... of course if someone asks you for "just a chapter or two" and you think you have something interesting to add (note it was never about the money, at an hourly rate it truly sucked) you might feel like contributing to a "cut & shut" as I like to think of them. Of course if you take that approach you need a really good editing team/overview which doesn't always happen.