Now that the grammar and spelling lesson is over, here’s my suggestions. Without knowing exactly what you have read, what style of writing you prefer, or what it is you’re exactly looking for (Church history, theology, etc) these is what I would recommend:
Theology: Catholic Christianity, by Peter Kreeft. This is a systematic presentation of the Faith based upon the Catechism of the Catholic Church, but much easier and even enjoyable to read.
Theology For Beginners, by Frank Sheed. Don’t let the name fool you. Even though it’s not a tough read, this small book is a classic which explain some of the tough mysteries of the Faith (like the spirituality of the soul, the Trinity, the Incarnation, etc.)
**Jesus Christ: **To be a Catholic means to have a deep and intimate knowledge of our Lord Jesus Christ. Ways to grow in this relationship are prayer and receiving the Sacraments. But learning and mediating more about our Lord’s life is also essential. For this I recommend two books you would probably enjoy reading together.
To Know Christ Jesus, (again) by Frank Sheed.
Life of Christ, by Fulton Sheen.
It goes without saying you should have a Catechism of the Catholic Church and personal Catholic version of the Bible. For some ideas on Bible study, please visit my humble website linked below.