Publishers
- H. & J. Pillans & Wilson 2
- H. Alabaster, Gatehouse & Co. 1
- H. Besley 1
- H. Dumont 1
- H. F. & G. Witherby 6
- H. Fisher, Son And Jackson 2
- H. Fleischmann 2
- H. Humphreys 2
- H. Pordes 1
- H. Veenman & Zonen Ltd. 1
- H.A. and W.L. Pitkin Ltd. 3
- H.D. Symonds 1
- H.F. & G. Witherby Ltd. 32
- H.F. Ullmann 2
- H.G. Walters 1
- H.J. Drane 1
- H.J. Publications 1
- H.K. Lewis 1
- H.M. Caldwell Company 1
- H.O. Duncan 1
- Haakman B.V. 1
- Hachette 6
- Hackman Printers Ltd. 1
- Haessner Publishing Inc. 1
- Hafner Publishing Company 1
- Haile Sellassie I University 2
- Haileybury And Imperial Service College 1
- Hal Leonard Books 1
- Halcyon House 1
- Hali Publications Limited 1
- Hall & Knight Ltd 1
- Hall Park Books Ltd. 10
- Hallmark 1
- Halsgrove 6
- Halton & Truscott Smith Ltd. 4
- Hambleside Publishers 1
- Hamilton, Adams & Co. 5
- Hamilton, Adams, and Co. 1
- Hamish Hamilton 75
- Hamish Hamilton Childrens Books 12
- Hamish Hamilton Ltd 2
- Hamlyn 14
- Hampshire County Council 3
- Hampster Books 3
- Hamwic Publishers 1
- Handpost Books 3
- Hanns Reich 2
- Harbour Publishing 3
- Harcourt Brace & World Inc. 1
- Harcourt Brace Jovanovich, Publishers 2
- Harcourt, Brace & Company 1
- Harcourt, Inc 1
- Harleyford Publications Limited 2
- Harmsworth Bros., Limited 1
- Harper & Bros 6
- Harper & Row 10
- Harper And Brothers 7
- Harper Collins 64
- Harper Collins Childrens Books 30
- Harper Collins Publishers Ltd 4
- Harper Press 3
- Harpercollins Publishers Ltd 2
- HarperCollinsPublishers (New Zealand) Ltd 1
- HarperNorth 1
- Harrap 2
- Harrison House 1
- Harrowood Books 1
- Harry Margary 1
- Harry N. Abrams 6
- Harry N. Abrams, Inc. 6
- Hart Publishing Co. 1
- 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 1
- Harwood Academic Publishers 1
- Hatchard & Co. 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 52
- Haynes Publishing 46
- Haynes Publishing Group 93
- Hazan 1
- Hazell Watson & Viney Ltd. 1
- Hazleton Publishing 73
- Hazleton Securities 2