Publishers
- Bickers & Son Ltd. 1
- Birdlife International 2
- Birdworld 1
- Birkhauser 2
- Birkhauser Verlag 1
- Birlinn Limited 8
- Birmingham City Council 1
- Birn Brothers 2
- Birn Brothers Ltd. 20
- Bison Books 8
- Bison Group 1
- Black Belt Press 1
- Black Cat 2
- Black Dwarf Publications 1
- Blackfriars Press 1
- Blackie 16
- Blackie & Son 12
- Blackie & Son Ltd. 390
- Blackie Academic & Professional 1
- Blackie And Son Limited 29
- Blackie Children's Books 3
- Blackstaff Press 1
- Blackwell Publishing 2
- Blackwell Science 5
- Blackwell Scientific Publications 17
- Blackwood Morton & Sons Ltd 1
- Blades, East & Blades 1
- Bladon Publishing 1
- Blandford 2
- Blandford Press 17
- Blandford Press Ltd. 5
- Blink Publishing 1
- Bliss, Sands & Co. 1
- Blitz Editions 1
- Blond Educational 1
- Bloomsbury 34
- Bloomsbury Books 8
- Bloomsbury Children's Books 10
- Bloomsbury Publishing Plc 3
- Blorenge Books 4
- Bloud Et Gay 1
- Blue Book Publishing Company 1
- Blue Door 1
- Blumenthals Ltd 1
- Bma Cymru Wales 1
- Bob Englehart 1
- Bob Tuck 1
- Bodleian Library 2
- Boisterous Books Ltd 1
- Boivin & Cie, Editeurs 2
- Bomford & Evershed Ltd. 1
- Bonanza Books 1
- Bond Publications 1
- Book Club 1
- Book Club Associates 19
- Book Guild Publishing 2
- Book Law Publications 29
- Bookano Strand Publications Ltd. 1
- Bookland Private Limited 3
- Booklaw Publications 3
- Booklaw Railbus 9
- Bookman Publishing 1
- Bookmarque Publishing 3
- Booky Publisher 1
- Boolarong Publications 2
- Booth Museum Of Natural History 2
- Booth-Clibborn 2
- Boots the Chemists 2
- Bosch 1
- Bossiney Books 2
- Botanical Society Of The British Isles 6
- Bothy Books 1
- Bound Biographies 1
- Bounty Books 6
- Bountyhunter Publications 9
- Boxtree Limited 1
- Bracken Books 7
- Bradbury 1
- Bradbury & Evans 2
- Bradbury Press 3
- Bradbury, Agnew & Co. 1
- Bradbury, Agnew & Co. Ltd. 4
- Bradbury, Evans And Co. 1
- Bradford Barton 2
- Bradley Publications Of Hull 1
- Bramhall House 1
- Bramley Books 4
- Brassbounders (publishing) 1
- Brassey's 10
- Brassey's Defence Publishers 1
- Braun & Schneider 1
- Breedon Books Publishing Co. 5
- Brehmer & Minuth 1
- Brent Press Ltd 2
- Brentano's 2
- Brentano's Ltd 1
- Brevet Press 1
- Brewin Books 3
- Brian A.F. Elks 1
- Brian Trodd 2