I was in the right place at the right time when a Series editor asked me to write a book for his series. This led to me writing two books published by Springer-Verlag.

Essential Coldfusion fast
A fast way of picking up some knowledge of Macromedia's Coldfusion products. Step by step and simple way of creating databases and connecting them to the web and web applications. This book is currently out of print but you can see more details and order a pdf version at my website for the book http://www.coldfusionfast.com.
Please note that this site was designed a several years ago to tie in with the book - so the design and HTML coding leaves a lot to be desired when compared to modern standards!.
My ColdFusion News:
New host, Different Rules
Free Coldfusion Software?

Database Design Manual: using MySQL for Windows
Many tutorials on MySQL are purely on Linux platforms, and most of us Windows users are petrified of it. So this is for you. The book shows you how to learn about databases, their setup and hints on design - All from a Windows perspective. You will setup and access a MySQL server on a windows machine, and be shown how to interact with it. Buy the book from amazon here.

I enjoy writing technical manuals and have written quite a lot more as part of my employment over the last few years.