From the Foreword:
Before we get started, I would like to thank Rebecca Murphey for inspiring me to write the original version of this online book and more importantly, open-source it. I believe educational material should be freely available for anyone to use, access and improve where possible and hope that efforts such as this inspire other authors. I would also like to extend my thanks to the always brilliant Alex Sexton who was kind enough to be the technical reviewer for the first edition of this work.
Finally, I would like to thank my wonderful wife Elle for putting up with my obsession for technical writing over the years. My hope is that I haven't abused the English language too badly."