The Penderwicks by Jeanne Birdsall
This is a re-read for me but I still enjoyed it as much as I did the first time around. This book is a charming story of 4 modern-day sisters aged 4, 10, 11 and 12 who go to an estate called Arundel for the summer with their widowed father. There, they make friend’s with the owner’s son and have many an adventure. This book is a great summer read with plenty of action, humor, charm and wit. I now own this book and will probably wind-up re-reading it a thousand times over.