I read quite a lot of books. The best book I've read this year is probably The Good God by Michael Reeves. It's a book about the Trinity. The big point is that the Trinity is central to understanding who God is, to understanding the difference between Christianity and other religions, and to understanding how we can be saved. Reeves doesn't say anything new, but he explains the theology very accessibly and clearly, quoting and explaining "big name" theologians like Athanasius, Augustine, Luther and Richard of St Victor in a way that is accessible to all, and he does it very well. It would be my top recommendation for anyone wanting to understand the Trinity and why it matters, whether they were a new Christian or training for ordination. My one criticism of the book is it could be very good for ecumenism as well - building links between evangelical theology and the Roman Catholics and Orthodox, but the end lets it down in that sense. Trinitarianism is tru...