this seems to be the most complete bibliography for Roald Dahl I have been able to locate (though I only looked for a few minutes

). The guy sure has a lot of stuff....
Series
1. Charlie and the Chocolate Factory (1964)
2. Charlie and the Great Glass Elevator (1972)
Novels
The Gremlins (1943)
Sometime Never: A Fable for Supermen (1948)
James and the Giant Peach (1961)
The Magic Finger (1966)
Fantastic Mr. Fox (1970)
Danny: The Champion of the World (1975)
The Enormous Crocodile (1976)
My Uncle Oswald (1979)
The Twits (1980)
George's Marvelous Medicine (1981)
The BFG (1982)
Dirty Beasts (1983)
The Witches (1983)
The Giraffe and the Pelly and Me (1985)
Going Solo (1986)
Matilda (1988)
Esio Trot (1989)
Rhyme Stew (1989)
The Great Switcheroo (1990)
The Minpins (1991)
The Vicar of Nibbleswicke (1991)
My Year (1993)
The Mildenhall Treasure (1999)
Collections
Over to You: 10 Stories of Flyers And Flying (1946)
Someone Like You (1953)
Kiss Kiss (1959)
Selected Stories (1968)
Twenty-Nine Kisses from Roald Dahl (1969)
Switch Bitch (1974)
The Wonderful Story of Henry Sugar and Six More (1977)
The Complete Adventures of Charlie and Mr Willy Wonka (1978)
Tales of the Unexpected (1979)
Taste and Other Tales (1979)
More Tales of the Unexpected (1980)
A Roald Dahl Selection: Nine Short Stories (1980)
Further Tales of the Unexpected (1981)
Way Up to Heaven: And Other Stories (1981)
Roald Dahl's Revolting Rhymes (1982)
The Best of Roald Dahl (1983)
Boy: Tales of Childhood (1984)
The Puffin Roald Dahl Collection (1985)
Selected Works (1985)
Roald Dahl's Completely Unexpected Tales (1986)
Two Fables (1986)
The Roald Dahl Omnibus: Perfect Bedtime Stories for Sleepless Nights (1987)
A Second Roald Dahl Selection: Eight Short Stories (1987)
Ah, Sweet Mystery of Life (1988)
New Tales of the Unexpected (1988)
The Enormous Crocodile / The Magic Finger (1989)
The Collected Short Stories of Roald Dahl (1991)
The Complete Tales of the Unexpected (1991)
Edward the Conqueror: And Other Stories (1991)
Boy / Going Solo (1992)
The Vicar of Nibbleswicke and Other Stories (1992)
Charlie and the Chocolate Factory / James and the Giant Peach (1994)
Lamb to the Slaughter: And Other Stories (1995)
The Roald Dahl Audio Collection (1995)
The Enormous Crocodile and The Magic Finger (1996)
The Great Automatic Grammatizator: And Other Stories (1996)
Great Mouse Plot: And Other Tales of Childhood (1996)
Revolting Rhymes and Dirty Beasts (1996)
Roald Dahl Omnibus BFG, Matilda and Georges Marvellous Medicine (1996)
The Roald Dahl Treasury (1997)
The Umbrella Man: And Other Stories (1998)
Skin: And Other Stories (2000)
Ten Short Stories (2000)
Charlie Novels Plus Henry Sugar (2001)
The Man from the South: And Other Stories (2002)
Anthologies edited
Roald Dahl's Book of Ghost Stories (1956)
Non fiction
The Dahl Diary (1991)
Roald Dahl's Guide to Railway Safety (1991)
Roald Dahl's Revolting Recipes (1994)
Roald Dahl on Tape (1995)
Autobiography (1996)
Revolting Recipes (1996)
Roald Dahl's Cookbook (1996)
Even More Revolting Recipes (2001)
Anthologies containing stories by Roald Dahl
Timeless Stories for Today and Tomorrow (1952)
Alfred Hitchcock Presents (1957)
Best Tales of Terror (1962)
The 3rd Fontana Book of Great Horror Stories (1968)
The Price of Fear (1976)
The 24th Pan Book of Horror Stories (1983)
The Penguin Book of Horror Stories (1984)
Realms of Darkness (1985)
The Puffin Book of Horror Stories (1986)
The Flying Sorcerers (1987)
Scare Care (1989)
Short stories
Man from the South (1948)
The Wish (1948)
The Sound Machine (1949)
Taste (1951)
Dip in the Pool (1952)
Skin (1952)
Edward the Conqueror (1953)
Galloping Foxley (1953)
Lamb to the Slaughter (1953)
Neck (1953)
Poison (1953)
The Way Up to Heaven (1954)
Nunc Dimittis (1955)
Parson's Pleasure (1958)
A fine Son (1959)
Genesis and Catastrophe (1959)
Georgy Porgy (1959)
The Landlady (1959)
Pig (1959)
Royal Jelly (1959)
William and Mary (1959)
In the Ruins (1965)
Ah, Sweet Mystery of Life (1974) The Hitch-Hiker (1977)
The Butler (1980)
The Umbrella Man (1980)
Vengeance is Mine Inc. (1980)
Bitch
The Boy Who Talked with Animals
The Champion of the World
The Great Automatic Grammatizator
The Great Switcheroo
The Last Act
Lucky Break
The Mildenhall Treasure
Mr Botibol
Mr Feasey
Mr Hoddy
Mrs Bixby and the Colonel's Coat
My Lady Love, My Dove
A Piece of Cake
The Ratcatcher
Rummins
The Soldier
The Swan
The Visitor
The Wonderful Story of Henry Sugar