Gatwood Publishing is an independent book publisher owned and operated by David Gatwood. It currently publishes the Patriots series of science fiction novels.
These novels are produced using a highly customized toolchain that translates DocBook XML (with a few custom extensions) into LaTeX code for PDF output and into two slightly different EPUB versions, one of which is designed for actual EPUB use, the other of which is tweaked to produce better MOBI files for Kindle.
In addition to the custom toolchain, these books use a number of custom fonts. These fonts are derived from existing SIL-licensed fonts, with various glyph changes, kerning changes, and other tweaks. The fonts are available for download on the fonts page.