FIG. 1 is a front perspective view of a bookmark showing my new design;
FIG. 2 is a perspective view showing the bookmark as it appears on the page of a book thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a rear view thereof; and,
FIG. 7 is a left-side view thereof; the right-side being a mirror image.
The broken lines form no part of the claimed design.