Publishers
- Payne And Mackinlay 1
- Payot 1
- Peco Publications 1
- Pedigree Books Limited 62
- Peebles Press 1
- Peeters 1
- Peggy Cloth Books, Inc. 1
- Peko Publishing Kft. 2
- Pelham Books 17
- Pelham Richardson 1
- Pelican Publishing 1
- Pen & Sword 1
- Pen & Sword Aviation 16
- Pen & Sword Books 5
- Pen & Sword History 1
- Pen & Sword Maritime 2
- Pen & Sword Military 22
- Pen & Sword Transport 10
- Pen Press 1
- Pen Press Publishers Ltd. 2
- Penarth Past Oral History Group 3
- Pendragon Books 2
- Pendragon Partnership 1
- Pendragon Publishing 1
- Pendyke Publications 1
- Penguin 23
- Penguin Books 10
- Penguin Books Ltd 36
- Penguin Press 1
- Peninsula Press 1
- Pentagon Press 1
- Pentech Press 1
- Pentland Books Ltd 1
- Per Ardua Books 1
- Perca Press 2
- Percival Marshall & Co. 1
- Percival Marshall And Co Ltd. 6
- Percy Lund, Humphries & Co. Ltd. 2
- Pergamon Press 8
- Pergamon Press Ltd. 1
- Perpetua 1
- Perry Colour Books Ltd. 4
- Perry Miniatures 1
- Peter A. Harding 2
- Peter A. Heims Limited 1
- Peter B. Gunn 1
- Peter Bedrick Books 1
- Peter Davies 2
- Peter Garnett 1
- Peter Haddock 4
- Peter Hopwood & Co. Ltd 2
- Peter Huston Publishing 1
- Peter Lunn 2
- Peter Lunn (publishers) Ltd 1
- Peter Marcan Publications 2
- Peter Maskell Publishing Services 1
- Peter McBride & Richard Larn 1
- Peter Owen 2
- Peter Pitkin 3
- Peter Vine 1
- Peterson Publishing Company Limited 1
- Peveril Books 1
- Phaidon 3
- Phaidon Press 2
- Phaidon Press Limited 10
- Phalanx Publishing Co. Ltd. 1
- Pharos 1
- Philip Alan & Co Ltd 1
- Philip Allan 1
- Philip Allan & Co. 1
- Philip Wilson 2
- Philip Wilson Publishers 1
- Philippsen 2
- Philips Electrical Limited 1
- Phillimore 20
- Phillimore & Co. Ltd. 7
- Phillipson & Golder 1
- Philomel Books 3
- Phoebus 2
- Phoenix House 1
- Phoenix Publishing 1
- Photo Precision 1
- Photoglob Co. 1
- Photovision 1
- Physica-Verlag 1
- Piaggio 1
- Piatkus 1
- Pica Press 4
- Picador 1
- Piccadilly Press 6
- Pickering & Inglis 2
- Pickering & Inglis Ltd. 5
- Picton Publishing 4
- Pictorial Histories Publishing Company 6
- Picture Corgi 1
- Pilot Press Ltd. 1
- Pinter Publishers 1
- Pisces Angling Publications 1
- Pisces Publications 4
- Pitkin 8