Enter a 17th century battlefield as this immersive CGI video gives you a First Look inside a tour de force of military literature. Soldier and author Henry Hexham’s weapon wielding tips transformed warfare in the 17th century and became the most valuable military encyclopaedia of its day. This exceptionally elaborate copy of ‘The Principles of the Art Militarie’ is inscribed by the author to Charles II when he was Prince of Wales. The handsome work with engraved plates and early hand-colouring is a highlight of our upcoming sale ‘The Cottesloe Military Library’ (19 November | London). Carefully assembled by the third Lord Cottesloe, the library is probably the most extensive private collection of early printed books focused on military matters. Click here to watch more Sotheby’s videos.