Noun
slipcase (plural slipcases)
A box, open on one end, for keeping a set of books together.
Light edgewear only to slipcase. Source: Internet
Brought together in a beautiful slipcase, A First Book of Fairytales and A First Book of Myths are the perfect gift for a young loved one. Source: Internet
More recently, in 2009, the same publisher produced The LEGO Book, which was sold within a slipcase along with Standing Small: A celebration of 30 years of the LEGO minifigure, a smaller book focused on the minifigure. Source: Internet
Subtitle: "An All-Sky Atlas Comprising One Million Stars to Visual Magnitude Eleven from the Hipparcos and Tycho Catalogues and Ten Thousand Nonstellar Objects". 3 volumes, hardcover, in hardcover slipcase, set ISBN 0-933346-84-0. Source: Internet