An Introduction to Xak Stellar M. R. Mathias wrote a half million-word fantasy series (actually several of them) but one series in particular, was filled with sexual connotations, graphic sexual situations, and enough vivid detail describing battle scenes, wounds, and adult oriented motivations, it was unsuitable for anyone under the age of 17. That series did pretty well in its day, but the material is so compelling, and the storyline outside the adult content and gore, so well thought out,...