Beyond money, there are a few opportunities here. For example, maybe the author would see about letting you post his guide to your software on your site. This w

Beyond money, there are a few opportunities here. For example, maybe the author would see about letting you post his guide to your software on your site. This would be advertising for his book and a learning tool for your users. Second, you could offer to take a look at the material before he publishes it, make suggestions, etc. This would benefit him because you are a superuser, and it would benefit you because you can make suggestions and help make it the best advertising tool. Additionally, if you have a new software release coming up, you should offer to give him a beta version and at least let him know about the latest features, since books become outdated very quickly. This may even motivate you to get stuff done!