Richmal Crompton 
William Again [EPUB ebook] 

There is only one William. The loveable imp has been harassing his unfortunate family and delighting hundreds of thousands of readers for years. Here, William and his mate Ginger have to endure bankruptcy-they don’t even have enough money for sweets. Then William comes up with a fantastic idea-they’ll sell Ginger’s twins cousins as slaves! (Goodreads)