W Bryce Neilson & Martin R Warburton. Illustrated with b&w photographs by Paul Withers. Published by Galata Print Ltd. 2017 PB (card covers) A4  120 pages.  New revised and expanded edition.  Lists over 1250 varieties, more than 300 illustrated in b&w. Valuation guide.  With 10 pages of Additions and Amendments to July 2021.  New 

Features: Other and related pieces including miniatures, third-guineas, half-guineas, Queen Charlotte, five guineas, sovereigns and half-sovereigns, two-pound pieces, concoctions, counterfeits, a listing of the pieces normally only found pierced. Notes on the issuers and makers (12 pages), two pages on boxes and containers and a two-page comprehensive index.

A Checklist of Imitation Guineas and their Fractions
Commemorative and advertising imitation guineas.