| 4160 | 3218 | Richard Muir | Traveller's history of Britain and Ireland | 1983 | E/62.0 | Muir, |
| 4161 | 1543 | edited by W H Mullens and N F Ticehurst | Notes on Sussex ornithology - being extracts from the diaries (1845-1869) of Robert Nathaniel Dennis (sometime Rector of East Blatchington) | 1925 | E/07.4 | Mullen |
| 4162 | 7315 | Helen Muller | Jet jewellery and ornaments | 1980 | E/74 | Muller |
| 4163 | 7386 | H G Muller | Baking and bakeries | 1986 | E/72.5 | Muller |
| 4164 | 6578 | Julian Munby | St Mary's Hospital, Chichester : a short history and guide | 1987 | B/25.3 | Munby, |
| 4165 | 3821 | edited by Julian Munby | Domesday book : Hampshire | 1982 | E/64 | Domesd |
| 4166 | 15 | edited by Percy D Mundy | Memorials of old Sussex | 1909 | E/15 | Sussex |
| 4167 | 7500 | Harry Munn | Joinery for repair & restoration contracts | 1989 | B/10.2 | Munn, |
| 4168 | 4364 | compiled by R A Muntz | Some ancient interests of Fotheringhay | ? | B/26 | Fother |
| 4169 | 2287 | H Munzing | Catalogue & price list of brass & iron goods & tools (+ discounts booklet) | | WCP | Munzin |
| 4170 | 7932 | G Murphy | Founders of the National Trust | 1987 | E/51 | Nation |
| 4171 | 5150 | P Murray | Renaissance architecture | 1978 | B/01.0 | Murray |
| 4173 | 112 | Clifford Musgrave | The Sussex book | 1957 | E/15 | Sussex |
| 4175 | 3954 | Clifford Musgrave | Arundel Castle : ancestral home of the Dukes of Norfolk for 500 years | 1970 | B/27 | Arunde |
| 4177 | 3753 | Stefan Muthesius | The English terraced house | 1982 | B/22 | Muthes |
| 4178 | 15543 | Myson Heat Exchangers Ltd | The Myson Envoy Super Range of Fan Convectors | | WCP | Myson |
| 4181 | 278 | Ian Nairn and Nikolaus Pevsner | The buildings of England : Sussex | 1965 | B/01.0 | Pevsne |
| 4183 | 150 | Ian Nairn, Nikolaus Pevsner, and Bridget Cherry | The buildings of England : Surrey | 1971 | B/01.0 | Pevsne |
| 4184 | 718 | G J Nash | The new builders' handbook : No.3 : plumbing & hot-water fitting | 1946 | WCP | Nash, |
| 4185 | 8263 | Judy Nash | Thatchers and thatching | 1991 | B/05.62 | Nash, |
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