Publishers
- Harper Collins 69
- Harper Collins Childrens Books 31
- Harper Collins Publishers Ltd 6
- Harper Collins Religious 1
- Harper Press 5
- HarperCollins Childrens Books 2
- Harpercollins Publishers 9
- Harpercollins Publishers Ltd 1
- HarperCollinsPublishers (New Zealand) Ltd 1
- Harrap Limited 1
- Harrassowitz Verlag 1
- Harrowood Books 1
- Harry N. Abrams 5
- Harry N. Abrams, Inc. 3
- Hart Books 4
- Hart-Davis 1
- Hart-Davis Educational Limited 1
- Harvard University Press 3
- Harvester Press 1
- Harvey And Blythe 1
- Harvey And Darton 4
- Harvey Miller Publishers 2
- Harwood Academic Publishers 1
- Hasdrubal-Thalassa Hotels 1
- Hatje Cantz Publishers 1
- Havelock Publishing 1
- Haverstock Publishers Ltd. 1
- Hawk Books 1
- Hawk Books Limited 2
- Hawk Books Ltd. 4
- Hawk Editions 1
- Hawk Publishing 1
- Hawker Siddeley (hatfield) Service School 1
- Hawkhead Publishing 1
- Hawksbill Publications 1
- Hayloft Publishing Ltd 1
- Haymarket Motoring Publications 3
- Haymarket Publishing Limited 1
- Haynes 22
- Haynes Publishing 36
- Haynes Publishing Group 84
- Hayward Gallery 1
- Hazel Brill Jackson 1
- Hazell Watson & Viney Ltd. 1
- Hazleton Publishing 68
- Hazleton Securities 1
- Hazlitt, Gooden & Fox 1
- Head Of Zeus 1
- Headline 4
- Headline Book Publishing PLC 1
- Heathfield Railway Publications 1
- Heaven And Earth Publishing 1
- Heinemann 36
- Heinemann Educational Books 3
- Heinemann Quixote Press 1
- Heinemann Young Books 1
- Helena Osvaldova 1
- Helion & Company 21
- Helion & Company Ltd 4
- Helm Information 1
- Helmshore Local History Society 1
- Henderson Publishing 1
- Hendon Publishing Co. Ltd. 2
- Henrik Koppels Forlag 1
- Henry Altemus Company 10
- Henry And Co. 1
- Henry Frowde 41
- Henry G. Bohn 4
- Henry Herbert, Publisher 1
- Henry Holt and Company 4
- Henry Melland 2
- Henry Mozley And Son 1
- Henry Thomas 2
- Henry Washbourn 1
- Henry Young & Sons 1
- Her Majesty's Stationery Office 14
- Herald Gravure 1
- Herald Printers (whitchurch) Ltd 1
- Herbert & Daniel 1
- Herbert Jenkins 6
- Herbert Jenkins Limited 5
- Herbert Jenkins Ltd. 4
- Herbert Joseph 1
- Herbert Joseph Limited 2
- Herder & Co. 1
- Heritage Trust Of Lincolnshire 1
- Hermann 1
- Hermann & Cie. 1
- Hermann Schafftein 1
- Hermes House 2
- Herridge & Sons 1
- Hertfordshire Natural History Society 1
- Hickory House Press 1
- High Museum Of Art, Atlanta 1
- Hikoki Publications 5
- Hildesheimer & Faulkner 6
- Hillside Publishing 1
- His Majesty's Stationery Office 1
- Hisarlik Press 1
- Histoire & Collections 2