Art
- Ghosts of Borley (Hannah McTaggart) - 1954-57

Astral Projection
- 1952 (Peel Castle)

A-Z of Books

Bigfoot
- 1951 (The Big Foot Print)

Books
- Gazetteer of British Ghosts (1971)
- The Ghost Hunters (1985)
- The Ghost Hunter’s Guide (1986)
- Ghosts and How to See Them (1993)
- This Haunted Isle (1984)
- Haunted London (1973)
- The Haunting of Hill House (1959)
- Hauntings (1977)
- No Common Task (1983)
- The Shining (1977)

Chapters

Cryptids
- 1951 (The Big Foot Print)

Exorcism 
- 1945 (The White Lady)

Fairies 
- 2000 (The Cottingley Fairies and Conan Doyle)

Family Ghost
- 1931 (Underwood’s father, Eli)

The Ghost Club
- 1931, 1947, 1962, 1993

Ghost Hunting Equipment (and its Uses)
- 1947 (Fragments of Borley), 1949 (Lonely Langenhoe), 1966 (The Tulip Staircase), 1986 (The Ghost Hunter’s Guide), 1994 (Newark Park)

Ghostly Gazetteer

Ghost Guides 

Ghost of the Living
 - 1952 (Peter Underwood?)

Ghost Photography
 - 1966 (The Tulip Staircase, Queen’s House, Greenwich)

Google Maps

Haunted Churches
- Langenhoe, Essex - 1949
- Minsden Chapel, Hertfordshire - 1945
- St Dunstan, London - 1952
- Widecombe, Dartmoor - 1971

Haunted Houses
- Aboriginal house, Canada - 1931
- Abandoned Cottage, Cambridge - 1934
- Aldine House, London - 1951
- Berkeley Square, London - 1970
- Bilborough Estate, 1961
- Borley Rectory, Essex 1946, 1947, 1954-57
- Capesthorne Hall, Cheshire - 1958
- Derelict Mill, Hitchin - 1934
- The Ferry Boat Inn, Cambridgeshire - 1965
- Gargoyle Club, London - 1952

- Georgian House, Suffolk - 1943
- Home of Compassion, Thames Ditton - 1945
- Ightham Mote, Kent - 1984
- Newark Park, Gloucestershire - 1993
- Old house, Stoke Newington - 1969
- Old Post Office, Royston - 1947
- Peel Castle, Isle of Man - 1952
- The Queen’s House, Greenwich - 1966
- Rosehall, Hertfordshire - 1931
- Rushbrooke Hall, Suffolk - 1943
- St Anne’s, Gloucestershire - 1977
- Stanegarth, Cumbria - 1945 
- Sherrington Manor, Sussex - 1962
- Underwood home, Letchworth - 1932 
- Woburn Abbey, Bedfordshire - 1963

- Woodfield, Bedfordshire - 1947

Hoax
- 1961 (The Case That Never Was)

J.M. Dent (Book Publishers)
- 1939 (J.M. Dent), 1941 (Dent Life), 1951 (Aldine House)

Maps

Materialisation (manifestation)
- 1964 (Rosalie)

Media

People
- Adams, Paul (Author and Paranormal Historian) - 1964 (Rosalie)
- Davenport Brothers (Mediums) - 1931
- Dickens, Charles (Author) - 1941
- Doyle, Arthur Conan (Author) - 2000
- Flint, Leslie (Medium) - 1950 
- Garrett, Eileen (Medium) - 1948
- Grenfell, Wilfred (Arctic Adventurer) - 1931
- Harris, Bertha (Medium) - 1950 
- Hine, Reginald (Author and Historian) - 1945
- Johnson, Douglas (Medium) - 1950 
- Karloff, Boris (Horror Film Actor) - 1931
- Price, Harry (Psychical Investigator) - 1947 (Fragments of Borley), 1947 (The Invitation), 1948, 1964, 2000
- Rohmer, Sax (Author) - 1952
- Russel, Ian (Duke of Bedford) - 1963
- Shaw, George Bernard (Irish Playwright) - 1934
- Summers, Augustus Montague - 1975 (The Ghost Hunters), 1975 (The Italian Count)
- Thomas, Dylan (Welsh Poet and Writer) - 1952
- Underwood, Adam
- Underwood, Eli - 1932
- Verney, Harry (4th Baronet and Politician) - 1962
- Williams, Alan (Author) - 1997

Poltergeist - 1969 (Stoke Newington)

Published Work

Psychic Powers
- 1948 (SPR), 1950 (The Seance Room)

Seance 
- 1947 (Official Ghost Hunt), 1948 (SPR), 1950 (The Seance Room), 1961 (Bilborough Estate), 1966

Social Media

SPR (Society for Psychical Research)
- 1948

War
- 1942 (War Recruit), 1944 (Doodlebug)

Vampires
- 1975 (The Ghost Hunters), 1975 (The Italian Count)

Witchcraft
- 1963 (Journey into Witchcraft)

YouTube Channel