Soft Bound Leather Cover Books.

A soft bound leather cover book is a book with a leather cover that is flexible, it has no boards to make the cover stiff.
(My thanks to Mr William Pace for introducing me to the term "soft bound")
Keith.

Unknown Dutch Master. Title: Still-Life with Books. Date circa 1628.

Jan Lievens - Still Life with Books. Created: 1 January 1630

Jan Vermeulen (Haarlem 1638 - Haarlem 1674), Still Life of Books and Musical.

Saint Paul, c. 1624-1625. Agnes Etherington Art Centre, Kingston.

Still-Life-with-Books-1625-1630-ZZ-Jan-Davidsz-de-Heem.

Antonio_de_Pereda_y_Salgado_-_The_Knight's_Dream_(detail) 1650