Publishers
- Great Western Railway Company 1
- Green Tiger Press 1
- Greenhill Books 22
- Greening & Co. Ltd. 2
- Greenwich Editions 5
- Greenwillow Books 1
- Greenwood Press 1
- Grenville Publishing Company Limited 3
- Gresley Books 1
- Greystone Books 2
- Grid Publishing 1
- Griffin Press 1
- Griffith and Farran 5
- Griffith Farran & Co. 3
- Griffith Farran Browne & Co Limited. 4
- Griffith Farran Browne & Co. Ltd. 1
- Griffith Farran Okeden & Welsh 4
- Griffith, Farran, Browne & Co. 1
- Griffith, Farran, Okeden & Welsh 1
- Grimsby Public Libraries And Museum 1
- Groombridge & Sons 6
- Grosset & Dunlap 11
- Grosvenor Books 1
- Group Officers Association 1
- Grub Street 22
- Grund 1
- Gruppe C. Motorsport 4
- Gryphon Books 1
- Guardian Communications 1
- Guernsey Museums & Galleries 1
- Guild Publishing 21
- Guilford Press 2
- Guillaume 1
- Guinness Signatures 1
- Guinness Superlatives Ltd. 1
- Gulliver Books 1
- Gungarden Books 1
- Gv Art 1
- Gwas Prifysgol Cymru 1
- Gwasg Aberystwyth 2
- Gwasg Gee 1
- Gwasg Gomer 2
- Gwasg Prifysgol Cymru 3
- Gwent County Library 1
- Gwent Ornithological Society 1
- Gwerin Publications 2
- Gwydyr Mines Publications 1
- Gwynedd Archive Services 1
- Gymdeithas Yr Eisteddfod 1
- H. & J. Pillans & Wilson 2
- H. Alabaster, Gatehouse & Co. 1
- H. Dumont 1
- H. F. & G. Witherby 6
- H. Fisher, Son And Jackson 2
- H. Fleischmann 2
- H. Humphreys 2
- H. Veenman & Zonen Ltd. 1
- H.A. and W.L. Pitkin Ltd. 10
- H.D. Symonds 1
- H.F. & G. Witherby Ltd. 31
- H.F. Ullmann 1
- 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
- Hackett's 1
- 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
- Halcyon House 1
- Hali Publications Limited 1
- Hall & Knight Ltd 1
- Hall Park Books Ltd. 9
- Hallmark 1
- Halsgrove 7
- Halton & Truscott Smith Ltd. 4
- Hambledon And London 1
- Hambledon Continuum 1
- Hamilton, Adams & Co. 5
- Hamilton, Adams, and Co. 1
- Hamish Hamilton 67
- Hamish Hamilton Childrens Books 12
- Hamish Hamilton Ltd 2
- Hamlyn 15
- Hammer Museum And The Museum Of Contemporary Art 1
- Hammond, Hammond & Company Ltd. 3
- Hampshire County Council 3
- Hampster Books 3
- Handpost Books 3
- Hanns Reich 2
- Harbour Publishing 2
- Harcourt Brace Jovanovich, Publishers 2