Page layout of parts included by the \include command

Question

It is customary in big works like books or user manuals to split content in several separate files and \include them in the main document: usually each file contains a chapter, an appendix or more generally a unit of text which not nested in any of the remaining others. I tried to extend the use since, writing a user manual of a complex system, I have several parts which remains unchanged even for different systems and thus different manuals: therefore I tried and succeed in including single paragraphs or groups of such sections/subsections, which are naturally nested inside a single chapter, in the sense that the index numbering so generated is more than correct. However, as Mittelbach and Gossens say at page 19 of "The LaTeX Companion" (2nd ed.),

Note that each document part loaded via \include starts on a new page and finishes by calling \clearpage; thus, floats contained therein will not move outside the pages produced by this part. So natural candidates for \include are whole chapters of a book but not necessarily small fractions of text.

I would like to know if there is a way to inhibit this behavior, namely to avoid that chosen parts included with \include will start on a new page.