This is the perfect "first set" of chapter books for a little girl. My granddaughter started reading the books at age 5. At 8 years old, she still loves the Daisy Meadow fairy books, and gets excited whenever a new series comes out. The series includes the Rainbow Fairies; Weather Fairies; Jewel Fairies; Pet Fairies; and Fun Day Fairies.
The individual paperbacks are a big plus. The size and weight makes them easy to handle and carry on trips, in the car, around the house, etc. And the price is right. (They make good birthday party gifts, too.)
Big hardbound chapter books (in my experience) are seldom read. They're too heavy and awkward for a child to use. If you want to encourage individual reading, you need books of the right size and weight for a child, and on topics they enjoy. Happily, these fairy books fit the bill!