US D464504 S1
FIG. 1 is a left front perspective view of a bookcase showing my new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a front elevational view thereof; and,
FIG. 4 is a right side elevational view thereof.
The views of the bookcase not shown form no part of the claimed design. The dashed lines represent environmental elements only and form no part of the claimed design.