If I know someone is looking for a book of the Bible to read in their quiet time, I suggest Psalms.
What I love the most about Psalms is that it showed me God is a personal God. He didn’t make all things and then leave us to fend for ourselves. He is real, He is involved in our lives, and He loves us with a deep, abiding love. Whatever David and the other psalmists needed, God was there for them—whether it was protection, mercy, wisdom, or justice. God cared about what they were going through and intervened on their behalf. He is a personal God, the one and only personal God. And He is still personal today.