From: Radek Czajka <rczajka@rczajka.pl>
Date: Fri, 24 Apr 2020 16:52:17 +0000 (+0200)
Subject: Fixes #4001: TOC contains parent books, and add links to previous and next book.
X-Git-Url: https://git.mdrn.pl/wolnelektury.git/commitdiff_plain/292be7b4adfea60105ba78d74ace7425eb7a4284?hp=292be7b4adfea60105ba78d74ace7425eb7a4284

Fixes #4001: TOC contains parent books, and add links to previous and next book.
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