There are several reasons why I agree, but I want to elaborate on one specifically.
I believe almost all "meaning" comes from context. The process of reading a book is part of the process of developing a context for a story. When we come back to the book's beginning again, we are experiencing that same work in a new context. Often that new context provides elements in the text I may have missed on the first read-through
And, further, when I return to books with new life experiences their context has changed again, sometimes radically: reading King's "The Shining" as a preteen was very different than reading through it as a twice-divorced alcoholic with two grown children.
In my understanding, some texts allow for that return better than others.
Some texts are complex, in that they can speak deeply to us in many ways based on the varied contexts in which we approach them, and that's much of how I value the books I value.