Publishers
- 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
- Howard Frisch 1
- Howell Press 1
- Howland Associates 1
- HSW Print 1
- Hudson & Kearns 1
- Hudson Hills Press 2
- Hudson History 1
- Hugh Broadbent 1
- Hugh Evans 6
- Hugh Evelyn 3
- Hugh Henry 1
- Hughes & Son 4
- Hughes A'I Fab 4
- Hughes and Son Ltd. 3
- Hughes Griffin Press 2
- Hull City Museums 2
- Hull Museum 1
- Hulton Press 3
- Hulton Press Ltd. 9
- Humana Press 1
- Humber Paddle Steamer Group 1
- Humboldt Books 1
- Humphrey Milford 170
- Humphrey Toulmin 1
- Hungarian Technical Publishers 1
- Hunkydory Designs 2
- Hunter College Of The City University Of New York 1
- Hurst 1
- Hurst & Blackett 2
- Hurst & Blackett Ltd. 2
- Hurst & Co 1
- Hurtwood Press 1
- Hutchinson 25
- Hutchinson & Co. 10
- Hutchinson & Co. Ltd 26
- Hutchinson Australia 1
- Hutchinson Children's Books 3
- Hutchinson Education 1
- Hutchinson Junior Books 2
- Hutchinson Junior Books Ltd 1
- Hutchinson of London 7
- Hutchinson's Books for Young People 9
- Hutchinson's Scientific And Technical Publications 1
- Hyde Park Books Ltd 1
- Hyde Park Group Plc 1
- Hyperion 1
- Hythe Borough Council 1
- I. Foulkes 4
- I. Harding 1
- I. Murray 1
- I.B. Tauris & Co. Ltd. 5