Publishers
- Great Eastern Publishing 1
- Great Northern Books 4
- Great Western Railway Company 1
- Green Tiger Press 1
- Greenhill Books 18
- Greening & Co. Ltd. 2
- Greenwich Editions 4
- Greenwillow Books 1
- Greenwood Press 1
- Grenville Publishing Company Limited 3
- Gresley Books 1
- Greystone Books 2
- Grid Publishing 1
- Griffith and Farran 4
- Griffith Farran & Co. 3
- Griffith Farran Browne & Co Limited. 3
- Griffith Farran Browne & Co. Ltd. 1
- Griffith Farran Okeden & Welsh 4
- Griffith, Farran, Browne & Co. 1
- Griffith, Farran, Okeden & Welsh 1
- Groombridge & Sons 4
- Grosset & Dunlap 12
- Grosvenor Books 1
- Group Officers Association 1
- Grub Street 30
- Grund 1
- Gruppe C. Motorsport 1
- Gryphon Books 1
- Guardian Communications 1
- Guild Publishing 17
- Guilford Press 2
- Guillaume 1
- Guinness Signatures 1
- Guinness Superlatives Ltd. 1
- Gulliver Books 1
- Gv Art 1
- Gwas Prifysgol Cymru 1
- Gwasg Aberystwyth 2
- Gwasg Gomer 1
- Gwasg Prifysgol Cymru 2
- Gwent County Library 1
- Gwent Local History Council 1
- Gwerin Publications 2
- GWR 2
- Gwydyr Mines Publications 1
- Gwynedd Archive Services 1
- Gymdeithas Yr Eisteddfod 1
- H. & J. Pillans & Wilson 1
- H. Dumont 1
- H. F. & G. Witherby 4
- H. Fisher, Son And Jackson 2
- H. Fleischmann 2
- H. Humphreys 2
- H. Veenman & Zonen Ltd. 1
- H.A. and W.L. Pitkin Ltd. 7
- H.D. Symonds 1
- H.F. & G. Witherby Ltd. 30
- H.G. Walters 1
- H.J. Drane 1
- H.K. Lewis 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
- Haileybury Naural Science Society 1
- Hal Leonard Books 1
- Hali Publications Limited 1
- Hall Park Books Ltd. 6
- Hallmark 1
- Halsgrove 8
- Halton & Truscott Smith Ltd. 3
- Hambledon And London 1
- Hambledon Continuum 1
- Hamilton, Adams & Co. 5
- Hamilton, Adams, and Co. 1
- Hamish Hamilton 61
- Hamish Hamilton Childrens Books 15
- Hamish Hamilton Ltd 5
- Hamlyn 9
- Hamlyn Paperbacks 1
- Hammond, Hammond & Company Ltd. 2
- Hampshire County Council 2
- Hampster Books 3
- Handpost Books 3
- Hanns Reich 2
- Harbour Publishing 2
- Harcourt Brace Jovanovich, Inc. 1
- Harcourt Brace Jovanovich, Publishers 2
- Harcourt, Brace & Company 2
- Harley Books 3
- Harleyford Publications Limited 4
- Harmsworth Bros., Limited 1
- Harold Martin & Redman Ltd. 3
- Harper & Bros 7
- Harper & Row 10
- Harper And Brothers 6