Publishers
- Hazleton Publishing 72
- Hazleton Securities 1
- Hazlitt, Gooden & Fox 1
- Head Of Zeus 2
- Headhunter Books 1
- Headline 4
- Heads (congleton) Ltd 1
- Heathfield Publishing 1
- Heathfield Railway Publications 1
- Heaven And Earth Publishing 2
- Heimdal 1
- Heinemann 40
- Heinemann Educational Books 2
- Heinemann Young Books 1
- Helena Osvaldova 1
- Helion & Company 21
- Helm Information 1
- Helmshore Local History Society 1
- Henderson Publishing 1
- Hendon Publishing Co. Ltd. 3
- Henrik Koppels Forlag 1
- Henry And Co. 1
- Henry Colburn And Co. 1
- Henry Frowde 47
- Henry G. Bohn 4
- Henry Garnett And Co., Limited 1
- Henry Herbert, Publisher 1
- Henry Holt and Company 5
- Henry Melland 2
- Henry Mozley And Son 1
- Henry Regnery Company 1
- Henry Thomas 2
- Henry Washbourn 1
- Henry Young & Sons 1
- Her Majesty's Stationery Office 21
- Herald Gravure 1
- Herald Printers (whitchurch) Ltd 1
- Herbert & Daniel 1
- Herbert Jenkins 8
- Herbert Jenkins Limited 4
- Herbert Jenkins Ltd. 3
- Herbert Joseph 1
- Herbert Joseph Limited 3
- Herbig 1
- Hercules Publishing House 1
- Herder & Co. 1
- Hereford City Council 1
- Heritage House Publishing Company Ltd. 1
- Heritage Press (scotland) 1
- Heritage Trust Of Lincolnshire 1
- Hermann 1
- Hermann & Cie. 1
- Hermann Schafftein 1
- Hermes House 1
- Herridge & Sons 1
- Hertfordshire Natural History Society 3
- Hertfordshire Publications 1
- Hickory House Press 1
- High Museum Of Art, Atlanta 1
- Highgate Publications Ltd 1
- Hikoki Publications 6
- Hildesheimer & Faulkner 9
- Hillhead Publications 1
- Hillside Publishing 1
- His Majesty's Stationery Office 2
- Hisarlik Press 1
- Histoire & Collections 6
- Historic Buildings & Monuments Commission For England 1
- Historic England 1
- Historica Selecta 1
- Historical Aviation Album 2
- Historical Model Railway Society 2
- Historical Publications Ltd. 6
- History And Museums Divisions 1
- History Research 1
- Hitchin Urban District Council 2
- HMSO 32
- Hodder & Stoughton 340
- Hodder & Stoughton Children's Books 3
- Hodder Children's Books 24
- Holborn House 1
- Holiday House, New York 3
- Holland Studio Craft Ltd. 3
- Hollis & Carter 14
- Holt Rinehart & Winston 1
- Holywell Press 3
- Home Words Publishing Office 1
- Homewood Publishing Company 1
- Honda (u.K.) Ltd. 1
- Hong Kong Museum Of Art 1
- Honno 1
- Hood & Co. Limited 1
- Horizons De France 1
- Houghton Mifflin and Company 2
- Houghton Mifflin Company 8
- Houghton Mifflin Company Boston 1
- Houlston & Sons 2
- Houlston and Stoneman 1
- Howard Baker 95
- Howard Baker Press 75