Harriot's book on algebra was published after his death in latin. Unfortunately, the publishers of the day were unable to understand Harriot's genius, his notations and some of his most beautiful results so that in the end they made a mess out of the manuscript pages and published a corrupted book which was soon forgotten. Thanks to Dr Stedall the "original" book, i.e. the one Harriot had in mind, was restored and translated into english. This is a revelation indeed and shows Harriot as a brilliant mathematician at work. You find an ingeniuous notation (far, far, far ahead of Oughtred's) and many "modern" results like the representation of polynomials as product of linear factors. Stedall did a beautiful job not only in restoring the original order of pages and in working out the translation but also in carefully editing and adding helpful notes as well as a gentle introduction. This is the fourth book I read from the same author (J. Stedall) and as the other 3 it was a pleasure and gave insight, insight, insight!