The mark consists of the trade dress of a series of book covers consisting of a black background with the following features: the series title centered near the top; below the series title, a large central image area bounded above and below by two thin light gray horizontal lines that extend across the full width of the cover; immediately below the lower of those two light gray horizontal lines, a horizontal band divided into a narrower rectangular box on the left containing the volume number and a wider rectangular box on the right with a dark gray background containing the volume title; a thin light gray horizontal line extending across the full width of the cover immediately below the band containing the volume number and volume title; the author’s name positioned below that light gray horizontal line, aligned to the right; and the overall arrangement, proportions, and color scheme as shown in the drawing. The broken lines in the drawing indicate the placement of the series title, the central image, the volume number, the volume title, and the author’s name. These elements and the specific wording, imagery, and background color of the volume number box are not claimed as part of the mark and serve only to show the position and context of the trade dress. The black background, the light gray color of the three horizontal lines, and the dark gray background of the volume title box are consistent across the series.