Bookshelf

FIG. 1 is a front perspective view of a bookshelf showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left elevation view thereof;

FIG. 7 is a right elevation view thereof;

FIG. 8 is a front perspective view of another embodiment of a bookshelf showing the new design;

FIG. 9 is a front elevation view thereof;

FIG. 10 is a back elevation view thereof;

FIG. 11 is a top plan view thereof;

FIG. 12 is a bottom plan view thereof;

FIG. 13 is a left elevation view thereof;

FIG. 14 is a right elevation view thereof;

FIG. 15 is a front perspective view of another embodiment of a bookshelf showing the new design;

FIG. 16 is a front elevation view thereof;

FIG. 17 is a back elevation view thereof;

FIG. 18 is a top plan view thereof;

FIG. 19 is a bottom plan view thereof;

FIG. 20 is a left elevation view thereof; and,

FIG. 21 is a right elevation view thereof.

The broken lines shown in the figures illustrate portions of the bookshelf that form no part of the claimed design.