Carl McColman has both studied and practised the Christian mystical tradition, stressing its earthiness and 'ordinariness'. He holds that mysticism is not an esoteric realm, reserved for the very holy, but is what all Christian life is about. I strongly commend The Big Book of Christian Mysticism.
With his Big Book of Christian Mysticism Carl McColman has pulled off a tour de force: an excellent introduction to the subject for the general reader, but with plenty of meat for the specialist. Highly recommended.