Available or pre-order now (and ideal to add your Christmas list) is The Perfectly Dressed Gentleman book by Robert O'Byrne and Lord Dunsby, which is published by CICO Books.
The book itself is much as it sounds, described as an 'indispensable guide through the modern sartorial maze', with practical advice on what to wear on every occasion, from workplace to wedding or from home to holiday. There's even advice on how to post a good suit, how to tie a tie (or bow tie) and ideas on accessories.
All of that is backed up with some stylish, retro-styled illustrations from Lord Dunsby (who actually did the banner for Retro To Go, amongst other projects), to show off the styles and the looks. If you want a copy, it's printed in hardback from 13th October, with pre-sales being taken now for £8.99.