Written by a world expert on the subject, Origametry is the first complete reference on the mathematics of origami. It is an essential reference for researchers of origami mathematics and applications in physics, engineering, and design. Educators, students, and enthusiasts will also enjoy this fascinating account of the mathematics of folding.

With a foreword by Oliver Sacks Shortly after John Hull went blind, after years of struggling with failing vision, he had a dream in which he was trapped on a sinking ship, submerging into another, unimaginable world. The power of this calmly eloquent, intensely perceptive memoir lies in its thorough navigation of the world of blindness—a world in which stairs are safe and snow is frightening, where food and sex lose much of their allure and playing with one's child may be agonizingly difficult. As he describes the ways in which blindness shapes his experience of his wife and children, of strangers helpful and hostile, and, above all, of his God, Hull becomes a witness in the highest, true sense. Touching the Rock is a book that will instruct, move, and profoundly transform anyone who reads it.

As staff travel writer on The Times, Tom Chesshyre had visited over 80 countries on assignment, and wondered: what is left to be discovered? On a mad quest he visited secret spots of Britain in search of the least likely holiday destinations. With a light and edgy writing style, Tom peels back the skin of the unfashionable underbelly of Britain.

Discipleship occurs when someone answers the call to learn from Jesus how to live his or her life as though Jesus were living it. The end result is that the disciple becomes the kind of person who naturally does what Jesus did. How the church understands salvation and the gospel is the key to recovering a biblical theology of discipleship. Our doctrines of grace and salvation, in some cases, actually prevent us from creating an expectation that we are to be disciples of Jesus. A person can profess to be a Christian and yet still live under the impression that they don’t need to actually follow Jesus. Being a follower is seen as an optional add-on, not a requirement. It is a choice, not a demand. Being a Christian today has no connection with the biblical idea that we are formed into the image of Christ. In this ground-breaking new book, pastor and author Bill Hull shows why our existing models of evangelism and discipleship fail to actually produce followers of Jesus. He looks at the importance of recovering a robust view of the gospel and taking seriously the connection between conversion—answering the call to follow Jesus—and discipleship—living like the one we claim to follow.