Here are the links to six "major" reviews of Bonhoeffer: Pastor, Martyr, Prophet, Spy by Eric Metaxas (Thomas Nelson, 2010) that I know of in the order they were published in the last year. Each argues that the anachronistic American conservative evangelical bias is the book's weakness.
"Bonhoeffer: The evangelical hero."
by Andy Rowell
Th.D. student at Duke Divinity School
Books & Culture
June 2010
http://www.booksandculture.com/articles/webexclusives/2010/june/bonhoeffer.html
"Review"
by Victoria Barnett
General Editor, Dietrich Bonhoeffer Works, English Edition and
Director of Church Relations, U. S. Holocaust Memorial Museum
Association of Contemporary Church Historians Newsletter
September 2010.
http://journal.ambrose.edu/ojs/index.php/acchquarterly/article/view/46/92
"Hijacking Bonhoeffer"
by Clifford Green
Executive director of Dietrich Bonhoeffer Works.
Christian Century
October 5, 2010
http://www.christiancentury.org/reviews/2010-09/hijacking-bonhoeffer
"Metaxas's Counterfeit Bonhoeffer: An Evangelical Critique"
by Richard Weikart
Department of History, California State University, Stanislaus and author of The Myth of Dietrich Bonhoeffer: Is His Theology Evangelical?
Reviewer's website.
January 2011
http://www.csustan.edu/history/faculty/weikart/Metaxas.htm
"The Grounds of Courage"
by Alan Wolfe
Professor of Political Science and Director of the Boisi Center for Religion and American Public Life at Boston College
The New Republic
February 3, 2011
http://www.tnr.com/print/article/books-and-arts/magazine/81378/Dietrich-Bonhoeffer-pastor-martyr-spy
"Agenda-Driven Biography: Two very different tellings of the life and times of Dietrich Bonhoeffer."
By Nancy Lukens
Nancy Lukens is a retired University of New Hampshire professor of German and women’s studies. She has translated works by Dietrich Bonhoeffer, Dorothee Soelle, and East German church leaders involved in the nonviolent opposition of the 1980s.
Sojourners
February 2011
http://www.sojo.net/index.cfm?action=magazine.article&issue=soj1102&article=agenda-driven-biography
This last article by Lukens recommends
Dietrich Bonhoeffer 1906-1945: Martyr, Thinker, Man of Resistance by Ferdinand Schlingensiepen (T & T Clark; released in English in June 2010). This is also the book that J. Kameron Carter is using in his Duke Divinity course this semester on Bonhoeffer.
See my Dietrich Bonhoeffer category for more on Bonhoeffer.
Related:
The review by conservative reformed blogger Tim Challies (May 25, 2010) and his subsequent reflection Counterfeit Bonhoeffer (Jan 18, 2011)
Bonhoeffer and Anonymous Evangelicals
by Carl Trueman
January 18, 2011
Reformation 21 blog
Redeeming Bonhoeffer (The Book): The problem with Eric Metaxas's portrayal of the German hero as an evangelical.
by Jason B. Hood
Christianity Today online
February 7, 2011