Colin R. Nicholl examines the situations giving rise to each Thessalonian Epistle to determine how the two relate historically. His book presents a compelling hypothesis, arguing that the two letters reflect two stages of a single crisis plaguing a recently formed Greek Church, (which spiralled from hope into despair because of confusion about the "end" time.) This monograph is the most up-to-date and comprehensive account of the Thessalonian Epistles currently available.
