Publishers
- Harcourt, Brace & Company 1
- Harcourt, Inc 1
- Harley Books 4
- Harleyford Publications Limited 8
- Harmsworth Bros., Limited 1
- Harold Martin & Redman Ltd. 3
- Harper & Bros 6
- Harper & Brothers Publishers 1
- Harper & Row 10
- Harper And Brothers 6
- Harper Collins 64
- Harper Collins Childrens Books 28
- Harper Collins Publishers Ltd 3
- Harper Press 2
- Harpercollins Publishers 1
- Harpercollins Publishers Australia 1
- Harpercollins Publishers Ltd 2
- Harrap 2
- Harrassowitz Verlag 1
- Harrowood Books 1
- Harry Hawkins Hucksters Ltd 1
- Harry Margary 1
- Harry N. Abrams 5
- Harry N. Abrams, Inc. 6
- Hart-Davis 1
- Hart-Davis Educational Limited 1
- Harvard University Press 5
- Harvester Press 2
- Harvestmoon Publishing Ltd 1
- Harvey And Blythe 1
- Harvey And Darton 4
- Harvey Miller Publishers 2
- Harwood Academic Publishers 1
- Hatje Cantz Verlag 1
- Havelock Publishing 1
- Haverstock Publishers Ltd. 1
- Hawk Books Limited 2
- Hawk Books Ltd. 1
- Hawk Editions 1
- Hawk Publishing 1
- Hawker Siddeley (hatfield) Service School 1
- Hawksbill Publications 1
- Hayloft Publishing Ltd 2
- Haymarket Motoring Publications 3
- Haymarket Publishing Limited 1
- Haynes 43
- Haynes Publishing 34
- Haynes Publishing Group 91
- Hazell Watson & Viney Ltd. 1
- 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