Religious books are actually quite diverse, so you should be able to find one-or even a few that-cater to your needs and interests. For example, if you'd like to glean nuggets of wisdom from a Sufi mystic to live a more peaceful life, you may want to read The Essential Rumi anthology of poetry.
Perhaps you're at a loss making sense of holy books like the bible; a guide such as 40 Days Through the Bible can break down biblical themes and make them more digestible. Or maybe you want to explore secular humanism with Philip Kitcher's Life After Faith.