Many of the more costly books take a case to protect them from injury. For trade purposes this is simply cut from plain boards and remains uncovered.

The parts A overlap and are either pasted together or wired with the machine.

Similar cases of thinner boards-but covered-are made for hymn and prayer books. They are always pasted covered with a dark pressed paper, and the edge at the centre is cut with a gouge as seen in the adjoining illustration (Fig. 110).

Hymn and prayer books may at times have a cover this would be cut from stout paper, generally calf leather paper the color of the case covering (See Fig. 111).
Covers made in case form entail more work (Fig. 112). The centre piece has a joint at each side; this part is, therefore, covered with cloth, which extends over the pads Band C, all the rest being covered with dark pressed paper.

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