There is the view I call penal non-substitution, or the penal example view. (It is also called the Governmental View in textbooks of theology.) This is often associated with Arminian theology stemming from the great Dutch jurist Hugo Grotius. However, the view was taken up by [Jonathan] Edwards's disciples in New England, who developed a Calvinistic strand of the doctrine.

For those who have only ever read about [John] Calvin, reading the man himself is an invigorating experience.

To my mind [ Jonathan Edwards] is an interesting figure because he is both a canonical Reformed thinker, and yet also someone that pushed the envelope in a number of key areas of theology.

That is the great contribution of Reformed thinking to the Christian church: theology for a life well-lived.

I think everyone who has an interest in Reformed theology, or just in Christian theology more generally, should read John Calvin Institutes.

[John Calvin's] treatment of the person and work of Christ, of the Holy Spirit in the life of the believer, of prayer and liturgy, of the sacraments, and of the way in which we have an in-built sense of the divine that we suppress to our great sorrow - these are all immense contributions to Christian thought. The same could be said of his commentaries, which are still regularly consulted by biblical critics today.

Sometimes we can lose the wood for the trees. Some specific issues dealt with in the book [Saving Calvinism]: the scope of election (who is saved?); the nature of the atonement (do we have to hold to penal substitution if we're Reformed?); the scope of the atonement (for whom did Christ die?); whether we have to hold to some sort of theological determinism (God ordains all that comes to pass).