(57) A book or volume having a composite structure that can be divided into finished sections,
particularly for school texts, university texts, and for other similar uses, comprising
a plurality of sections (4,5,6,7) related to specifically defined subjects or part
thereof and are enclosed and bound in a conventional manner in a continuous cover
(2,2a) made of cardboard or the like, each section (4,5,6,7,) being divided from the
contiguous one by means of two covers or leaves (2a,4a;5a,5b;6a,6b;7a,2) that are
glued to the inner wall of the spine or back (3) of the volume and to the first and
last sheet of the section, so as to obtain a plurality of sections complete with covers
and with the corresponding spine monolithically with the spine of the outer continuous
cover; the individual sections (4,5,6,7) that constitute the volume are then easily
separable from each other by cutting or tearing along the continuous ribbing line
(8) that retains the covers or leaves of two contiguous sections.
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