diff --git a/mod/book/tool/importhtml/locallib.php b/mod/book/tool/importhtml/locallib.php
index 3f6714258f7..41da0870731 100644
--- a/mod/book/tool/importhtml/locallib.php
+++ b/mod/book/tool/importhtml/locallib.php
@@ -134,12 +134,18 @@ function toolbook_importhtml_import_chapters($package, $type, $book, $context, $
                     // it is either absolute or pluginfile link
                     continue;
                 }
-                $chapterpath = dirname($chapter->importsrc).'/'.$matches[2][$i];
+
+                [$path, $anchor] = array_pad(explode('#', $matches[2][$i], 2), 2, '');
+                if (!empty($anchor)) {
+                    $anchor = '#' . $anchor;
+                }
+
+                $chapterpath = dirname($chapter->importsrc).'/'.$path;
                 $chapterpath = toolbook_importhtml_fix_path($chapterpath);
                 foreach ($allchapters as $target) {
                     if ($target->importsrc === $chapterpath) {
-                        $newcontent = str_replace($match, 'href="'.new moodle_url('/mod/book/view.php',
-                                array('id'=>$context->instanceid, 'chapterid'=>$target->id)).'"', $newcontent);
+                        $newcontent = str_replace($match, 'href="' . new moodle_url('/mod/book/view.php',
+                            ['id' => $context->instanceid, 'chapterid' => $target->id]) . $anchor . '"', $newcontent);
                     }
                 }
             }
diff --git a/mod/book/tool/importhtml/tests/fixtures/chapters_links.zip b/mod/book/tool/importhtml/tests/fixtures/chapters_links.zip
new file mode 100644
index 00000000000..df9a046a8dc
Binary files /dev/null and b/mod/book/tool/importhtml/tests/fixtures/chapters_links.zip differ
diff --git a/mod/book/tool/importhtml/tests/locallib_test.php b/mod/book/tool/importhtml/tests/locallib_test.php
index 959ab18442c..0f9be881d23 100644
--- a/mod/book/tool/importhtml/tests/locallib_test.php
+++ b/mod/book/tool/importhtml/tests/locallib_test.php
@@ -39,41 +39,79 @@ require_once($CFG->dirroot.'/mod/book/tool/importhtml/locallib.php');
  */
 final class locallib_test extends \advanced_testcase {
 
+    /** @var object */
+    private object $book;
+    /** @var object */
+    private object $context;
+    /** @var object */
+    private object $record;
+
     public function setUp(): void {
         parent::setUp();
         $this->resetAfterTest();
+
+        $course = $this->getDataGenerator()->create_course();
+        $this->book = $this->getDataGenerator()->create_module('book', ['course' => $course->id]);
+        $this->context = \context_module::instance($this->book->cmid);
+        $this->record = (object) [
+            'contextid' => $this->context->id,
+            'component' => 'phpunit',
+            'filearea'  => 'test',
+            'itemid'    => 0,
+            'filepath'  => '/',
+        ];
     }
 
+    /**
+     * Tests the events within toolbook_importhtml_import_chapters
+     * @covers ::toolbook_importhtml_import_chapters
+     */
     public function test_import_chapters_events(): void {
-        $course = $this->getDataGenerator()->create_course();
-        $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
-        $context = \context_module::instance($book->cmid);
 
-        $record = new \stdClass();
-        $record->contextid = $context->id;
-        $record->component = 'phpunit';
-        $record->filearea = 'test';
-        $record->itemid = 0;
-        $record->filepath = '/';
-        $record->filename = 'chapters.zip';
-
-        $fs = get_file_storage();
-        $file = $fs->create_file_from_pathname($record, self::get_fixture_path(__NAMESPACE__, 'chapters.zip'));
+        $this->record->filename = 'chapters.zip';
+        $file = get_file_storage()->create_file_from_pathname(
+            $this->record,
+            self::get_fixture_path(__NAMESPACE__, 'chapters.zip')
+        );
 
         // Importing the chapters.
         $sink = $this->redirectEvents();
-        toolbook_importhtml_import_chapters($file, 2, $book, $context, false);
+        toolbook_importhtml_import_chapters($file, 2, $this->book, $this->context, false);
         $events = $sink->get_events();
 
-        // Checking the results.
+        // Checking the results up to the triggered event.
         $this->assertCount(5, $events);
         foreach ($events as $event) {
             $this->assertInstanceOf('\mod_book\event\chapter_created', $event);
-            $this->assertEquals($context, $event->get_context());
+            $this->assertEquals($this->context, $event->get_context());
             $chapter = $event->get_record_snapshot('book_chapters', $event->objectid);
             $this->assertNotEmpty($chapter);
             $this->assertEventContextNotUsed($event);
         }
     }
 
+    /**
+     * Tests the conversion of (anchored) links within toolbook_importhtml_import_chapters
+     * @covers ::toolbook_importhtml_import_chapters
+     */
+    public function test_import_chapters_links(): void {
+        global $DB;
+
+        $this->record->filename = 'chapters_links.zip';
+        $file = get_file_storage()->create_file_from_pathname(
+            $this->record,
+            self::get_fixture_path(__NAMESPACE__, 'chapters_links.zip')
+        );
+
+        toolbook_importhtml_import_chapters($file, 2, $this->book, $this->context, false);
+
+        $chapters = $DB->get_records('book_chapters', ['bookid' => $this->book->id]);
+        foreach ($chapters as $chapter) {
+            $this->assertStringNotContainsString('.html', $chapter->content);
+            $this->assertStringNotContainsString('.html#anchor', $chapter->content);
+            $this->assertMatchesRegularExpression('/chapterid=[0-9]*"/i', $chapter->content);
+            $this->assertMatchesRegularExpression('/chapterid=[0-9]*#anchor"/i', $chapter->content);
+        }
+    }
+
 }