The first of these, and the main subject of the book, was the notion of the «Marian era». (faith.org.uk)
Its ambiguities, evasions and general lack of enthusiasm suggest that she was working out questions beyond or behind the ostensible subject of her book. (religion-online.org)
(Another important referent: the clean, white linework of Portuguese architect Álvaro Siza Vieira, subject of a book Wick owns.) (film.avclub.com)