There are a number of articles and papers, written by people who have links with Bethel, which are in the public domain. Some of them can be accessed here:
Was Adam a Real Person? by Rev. Mark G. Johnston
Calvin and Piety by Rev. Mark G. Johnston
Where have they Gone? by Rev. Mark G. Johnston
Effectual Calling and Trinitarian Balance by Rev. Mark G. Johnston
Alone, but Never Alone by Rev. Mark G. Johnston
Christ our Righteousness by Rev. Todd D. Matocha
How Should I Benefit from Communion? by Rev Ian Hamilton
The Father’s Great Love by Rev. Todd D. Matocha
The Christian Family by Rev. Todd D. Matocha
Developing a Trinitarian Mind by Rev. Dr. Robert Letham
Belonging to Christ’s Church by Rev Dr Peter J Naylor