As Heard on The Daily Gardener Podcast:
Rosemary Verey’s book Classic Garden Design (1984) gives us a glimpse of how much she learned from various gardens of the past, with their topiary, knot gardens and box-edged beds.
All are incorporated in her Barnsley garden, providing a formal structure, softened by roses and herbaceous perennials, which adds interest even in the wintertime.
Of course, one can't forget that it was Rosemary Verey who introduced and popularized the potager
You can get used copies of this book on Amazon, with the link above in the show notes for less than $6.
SI HORTUM IN HORTORUM PODCASTUM IN BIBLIOTEHCA HABES, NIHIL DEERIT.