The book is available at Project Gutenberg, Internet Archive, Hathi Trust, Google Books. There is also a free audiobook at Librivox. You can get a free Kindle too!
How Night Came
How the Rabbit Lost His Tail
How the Toad Got His Bruises
How the Tiger Got His Stripes
Why the Lamb Is Meek
Why the Tiger and the Stag Fear Each Other
How the Speckled Hen Got Her Speckles
How the Monkey Became a Trickster
How the Monkey and the Goat Earned Their Reputations
How the Monkey Got a Drink When He Was Thirsty
How the Monkey Got Food When He Was Hungry
Why the Bananas Belong to the Monkey
How the Monkey Escaped Being Eaten
Why the Monkey Still Has a Tail
How Black Became White
How the Pigeon Became a Tame Bird
Why the Sea Moans
How the Brazilian Beetles Got Their Gorgeous Coats