Since this book was originally published in 2009, there’s a high likelihood of finding its recipes online, if you search “rustic fruit desserts cookbook” and the recipe name from Eat Your Books (the title link in the OP goes there).
Here are just a few:
rhubarb fool (Epicurious, so possible paywall)
rhubarb buckle with ginger crumb
lemon blueberry buckle
cranberry buckle with crumb topping
apple crisp with brandy-soaked currants
Epicurious has several more, if you subscribe.
