短冊【たんざく】
tanzaku, long, narrow strip of paper on which Japanese poems are written (vertically), thin rectangle
冊子【さっし】
book, booklet, story book, pamphlet, notebook
分冊【ぶんさつ】
separate volume, fascicle, fascicule
小冊子【しょうさっし】
booklet, pamphlet
別冊【べっさつ】
separate volume, extra issue, supplement, additional volume, supplementary volume
冊数【さっすう】
number of books