Heinz employs his extensive experience in the restoration of the architect's buildings to introduce aspects that have previously gone unnoticed. Concentrating primarily on residences, Heinz uses his own photographs to examine construction techniques that are just as unorthodox as the architect himself, indicating that Wright's approach to detailing was pragmatic rather than conventional and was based on traditional common sense. Previously unpublished sketches on tracing paper provide a rare insight into Wright's design progression.