Good books are like being in relationship with someone with life experience and wisdom. The shortcoming is there is no dialogue or opportunity to ask what the author might have meant by what was said, yet it is relationship in that the author had an intent to convey something of importance he or she felt, processed, and thought enough about to communicate at an expense of time and effort. The author also risked exposing themselves to a world that is unfriendly and skeptical. But the risk is worth it if some receive and are given a perspective that advances the reader from a place of being stuck to another step forward.
The books I have included in this list are important contributions to areas of struggle for many people. None exhaust what needs to be said and none have the final word, but they do assist in the journey.