This book is a great intro to theology for christians. Jeffery begins the book with two chapters on why we need theology and then proceeds systematically through key doctrines. The doctrines that he covers are God, Jesus, The Holy Spirit, The Trinity, Sin, Atonemnet, Grace, Regeneration, Repentance and Faith, Reconciliation, Redemption, Justification, Adoption, Union with Christ, Sanctification, Election, Eternal Security, and The Second Coming. Jeffery is brief and to the point on these doctrines, and ends each chapter with a thought-provoking quote from historic defenders of these doctrines, and with questions to think about, and a book recommended for further reading. A must read for Christians!