Andy McConnell is probably the world’s most widely-published journalist specialising in ancient, antique, vintage & modern glassware.
He has written three books on the subject:
The Decanter, An Illustrated History of Glass, 2004.
20th Century Glass, 2006.
The Decanter, Ancient to Modern, 2018.
He writes for newspapers & journals & has been the BBC Antiques Roadshow’s glass specialist since 2005.
Andy lectures on the subject & runs Britain’s largest glass gallery/shop in his ancient hometown of Rye, on the south coast.
He also runs a Facebook group: https://www.facebook.com/groups/468787103603238/