Issue #3047806 by jhodgdon, Gayathri J, thejimbirch, anmolgoyal74, luwoldy, batigolix, shimpy, alonaoneill, volkswagenchick, tatarbj, Amber Himes Matz, rkoller, CelSki, xjm: Convert book.module hook_help() to topic(s) (cherry picked from commit c61c5dc1)
