This is the true story of Aemilius Felix Boioannes the younger, the intended and unintended consequence of his life, the bad stuff he did on purpose, and the good stuff that happened in spite of him. It is, in other words, the tale of a war to end all wars and the man responsible. 'A Practical Guide to Conquering the World' can be read by itself, but for those who like endings, it can also be considered the refreshingly pragmatic conclusion to K. J. Parker's acclaimed sequence of novels that began with 'Sixteen Ways to Defend a Walled City' and continued with 'How To Rule An Empire And Get Away With It'.