Enid Blyton books in order
129 books in the catalogue, about 461 hours of reading in all; the shortest takes 35 minutes and the longest 13 hours.
5 series and 85 standalone books in the catalogue.
The Famous Five
21 books 1 
Five on a Treasure Island 3.4 h 2 
Five Go Adventuring Again 3.5 h 3 
Five Run Away Together 3.5 h 4 
Five Go to Smuggler's Top 3.5 h 5 
Five Go Off in a Caravan 3.5 h 6 
Five on Kirrin Island Again 3.5 h 7 
Five Go Off to Camp 3.1 h 8 
Five Get Into Trouble 2.9 h 9 
Five Fall Into Adventure 7.8 h 10 
Five on a Hike Together 3.5 h 11 
Five Have a Wonderful Time 3.7 h 12 
Five Go Down to the Sea 3.8 h 13 
Five Go to Mystery Moor 3.5 h 14 
Five Have Plenty of Fun 4.1 h 15 
Five on a Secret Trail 3.4 h 16 
Five Go to Billycock Hill 3.4 h 17 
Five Get into a Fix 3.5 h 18 
Five on Finniston Farm 3.5 h 19 
Five Go to Demon's Rocks 3.5 h 20 
Five Have a Mystery to Solve 2.3 h 21 
Five Are Together Again 3.3 h
Five on a Treasure Island 3.4 h 2 Five Go Adventuring Again 3.5 h 3 Five Run Away Together 3.5 h 4 Five Go to Smuggler's Top 3.5 h 5 Five Go Off in a Caravan 3.5 h 6 Five on Kirrin Island Again 3.5 h 7 Five Go Off to Camp 3.1 h 8 Five Get Into Trouble 2.9 h 9 Five Fall Into Adventure 7.8 h 10 Five on a Hike Together 3.5 h 11 Five Have a Wonderful Time 3.7 h 12 Five Go Down to the Sea 3.8 h 13 Five Go to Mystery Moor 3.5 h 14 Five Have Plenty of Fun 4.1 h 15 Five on a Secret Trail 3.4 h 16 Five Go to Billycock Hill 3.4 h 17 Five Get into a Fix 3.5 h 18 Five on Finniston Farm 3.5 h 19 Five Go to Demon's Rocks 3.5 h 20 Five Have a Mystery to Solve 2.3 h 21 Five Are Together Again 3.3 h The Adventure Series
7 books
The Faraway Tree
3 books The Enchanted Wood length not known
The Magic Faraway Tree 3.4 h The Folk of the Faraway Tree length not known
The Five Find-Outers
6 books
The Naughtiest Girl
3 books The Naughtiest Girl Again length not known
The Naughtiest Girl is a Monitor 3.5 h The Naughtiest Girl in the School length not known
Standalone books
The O'Sullivan Twins 3.4 h 
The Secret Island 3.1 h 
The Enchanted Wood 3.5 h 
The Children of Cherry Tree Farm 2.9 h 
The Naughtiest Girl in the School 3.5 h 
Second Form at Malory Towers 2.9 h 
The Children of Willow Farm 3.4 h 
The Naughtiest Girl Again 3.8 h 
The Twins at St. Clare's 2.9 h 
Summer Term at St. Clare's 2.9 h 
Hollow Tree House 2.9 h 
The Family at Red-Roofs 3.5 h 
The Folk of the Faraway Tree 3.5 h 
House at the Corner 5.0 h 
The Adventurous Four Again 3.3 h 
Five Go Off to Camp 3.5 h 
The Sea of Adventure 4.3 h 
Five Get Into Trouble 3.5 h 
Noddy Goes to Toyland 1.1 h 
The Mystery of Tally-Ho Cottage 3.2 h 
The Mystery of the Pantomime Cat 3.5 h 
The Mystery of the Spiteful Letters 3.4 h 
The Secret of Spiggy Holes 3.0 h 
Upper Fourth at Malory Towers 2.9 h 
Five Fall Into Adventure 3.5 h 
In the Fifth at Malory Towers 2.9 h 
Secret Seven Adventure 2.3 h 
Shadow the Sheep-dog 4.0 h 
The Mystery of the Invisible Thief 3.2 h 
The Mystery of the Secret Room 2.9 h 
The Rilloby Fair Mystery 3.8 h 
The Wishing Chair Again 3.5 h 
Last Term at Malory Towers 2.9 h 
Noddy and His Car 1.1 h 
The Mystery of the Vanished Prince 3.5 h 
The Secret Seven and the Tree House Adventure 2.3 h 
The Six Bad Boys 4.1 h 
Well Done, Secret Seven 2.2 h 
Secret Seven on the Trail 2.5 h 
The Mystery of the Missing Necklace 3.0 h 
The Mystery of the Strange Bundle 3.3 h 
The Rubadub Mystery 4.3 h 
The Very Big Secret 1.6 h 
Go Ahead, Secret Seven 2.5 h 
The Secret of Moon Castle 3.0 h 
Good Work, Secret Seven 2.2 h 
Five Have Plenty of Fun 3.5 h 
The Secret Seven Win Through 2.2 h 
Six Cousins at Mistletoe Farm 3.5 h 
The Secret of Killimooin 2.7 h 
Three Cheers, Secret Seven 2.6 h 
Secret Seven Mystery 2.2 h 
Puzzle for the Secret Seven 2.6 h 
Secret Seven Fireworks 2.5 h 
Good Old Secret Seven 2.4 h 
Shock for the Secret Seven 2.4 h 
The Mystery of Banshee Towers 3.4 h 
Five Have a Mystery to Solve 3.4 h 
Look Out, Secret Seven 2.4 h 
Mr Galliano's Circus 3.0 h 
Fun for the Secret Seven 2.4 h 
The Mystery of the Hidden House 3.2 h 
The Second Form at St. Clare's 2.9 h 
Sunshine Book 3.4 h 
The Secret Mountain 2.9 h 
Third Year at Malory Towers 3.3 h 
Claudine at St. Clares 2.9 h 
Fifth Formers of St. Clare's 2.9 h 
First Term at Malory Towers 2.9 h 
The Children at Green Meadows 3.2 h 
Adventures of the Wishing-chair 3.4 h 
Fairyland Stories 2.7 h 
Up the Faraway Tree 1.8 h 
The Magic Mirror and Other Stories 3.5 h 
The Poor Little Owl 35 min 
Faraway Tree Stories 10.3 h 
Classic Enid Blyton Stories 2.4 h 
Enid Blyton Collection 9.1 h 
Here's the Naughtiest Girl! 1.5 h 
The Riddle of the Boy Next Door 3.2 h 
The Riddle of the Hollow Tree 3.2 h 
The Riddle of the Rajah's Ruby 3.2 h 
More Wishing-Chair Stories 2.6 h 
St. Clare's, The First Year 3.3 h 
Enid Blyton's Holiday Stories 6.2 h Collected editions
Volumes that gather several of the books above.
Mischief at St Rollo's / The Children of Kidillin 3.5 h 
First Term at Malory Towers / Second Form at Malory Towers / Third Year at Malory Towers 9.4 h 
The Enchanted Wood / The Magic Faraway Tree / The Folk of the Faraway Tree 12.6 h 
The Naughtiest Girl in the School; The Naughtiest Girl Again; The Naughtiest Girl Is a Monitor 6.3 h 
Upper Fourth at Malory Towers / In the Fifth at Malory Towers / Last Term at Malory Towers 9.1 h 
Five on a Treasure Island / Five Go Adventuring Again / Five Run Away Together 8.8 h 
Five on a Secret Trail ; Five Go to Billycock Hill 2.9 h 
Adventures of the Wishing-Chair / The Wishing-Chair Again / More Wishing Chair Tales 9.1 h