diff --git a/plugins/english/sylthorian.ts b/plugins/english/sylthorian.ts
new file mode 100644
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+++ b/plugins/english/sylthorian.ts
@@ -0,0 +1,179 @@
+import { load as parseHTML } from 'cheerio';
+import { fetchApi, FetchInit } from '@libs/fetch';
+import { Plugin } from '@/types/plugin';
+import { defaultCover } from '@libs/defaultCover';
+
+/**
+ * The Sylthorian (thesylthorian.com) — English LNReader plugin.
+ *
+ * thesylthorian.com is the author's own Squarespace storefront. The free web
+ * chapters are readable in full; some of the same books are also sold as
+ * e-books/paperbacks under `/published-books-portofolio/`, which this plugin
+ * intentionally ignores.
+ *
+ * The site is a hand-built Squarespace 7.1 site, so each section is authored
+ * HTML rather than a CMS collection. The shape the plugin relies on:
+ *
+ * - Listing:      `/web-novels` — one `<h3>` title immediately followed by a
+ *                 "Read it!" button linking to `/web-novels-1/<slug>`. All 10
+ *                 web novels fit on this single page; no covers are exposed.
+ * - Novel page:   `/web-novels-1/<slug>` — title in the first `<h2>`, cover in
+ *                 `og:image`, a "Synopsis:" text block, and the full chapter
+ *                 list as `/latest-chapters/<slug>-N` links (ascending, no
+ *                 pagination — up to ~189 chapters for the largest novel).
+ * - Chapter page: `/latest-chapters/<slug>-N` — body HTML inside
+ *                 `.blog-item-content.e-content .sqs-html-content`.
+ * - Search:       the site's own `/search?q=` page is JS-driven and mostly
+ *                 returns chapter hits, burying novel pages behind them, so
+ *                 the plugin filters the small `/web-novels` catalogue by
+ *                 title instead — deterministic and complete for 10 novels.
+ */
+class Sylthorian implements Plugin.PluginBase {
+  id = 'sylthorian';
+  name = 'The Sylthorian';
+  version = '1.0.0';
+  icon = 'src/en/sylthorian/icon.png';
+  site = 'https://thesylthorian.com';
+
+  // Throw (carrying the HTTP status) on a refused response so a runner-side
+  // block is reported INCONCLUSIVE per docs/testing.md instead of being
+  // parsed into a false empty-result FAIL.
+  private async fetchSite(url: string, init?: FetchInit) {
+    const res = await fetchApi(url, init);
+    if (!res.ok) {
+      throw Object.assign(new Error('Request failed: ' + res.status), {
+        status: res.status,
+      });
+    }
+    return res;
+  }
+
+  private fetchSiteText(url: string) {
+    return this.fetchSite(url).then(res => res.text());
+  }
+
+  /** Squarespace serves `og:image` over cleartext `http://`; upgrade it. */
+  private toHttps(url?: string) {
+    return url ? url.replace(/^http:\/\//, 'https://') : url;
+  }
+
+  /**
+   * The `/web-novels` page pairs each novel's `<h3>` title with the "Read it!"
+   * button that follows it, so walk the two in document order.
+   */
+  private parseNovelList(html: string): Plugin.NovelItem[] {
+    const $ = parseHTML(html);
+    const novels: Plugin.NovelItem[] = [];
+    const seen = new Set<string>();
+    let lastTitle = '';
+
+    $('h3, a[href^="/web-novels-1/"]').each((_, el) => {
+      const node = $(el);
+      if (node.is('h3')) {
+        lastTitle = node.text().replace(/\s+/g, ' ').trim();
+        return;
+      }
+      const path = node.attr('href');
+      if (!path || seen.has(path)) return;
+      seen.add(path);
+      novels.push({
+        name: lastTitle || path.split('/').pop() || path,
+        path,
+        cover: defaultCover,
+      });
+      lastTitle = '';
+    });
+
+    return novels;
+  }
+
+  private parseSummary($: ReturnType<typeof parseHTML>): string | undefined {
+    let summary: string | undefined;
+    $('.sqs-html-content').each((_, el) => {
+      const text = $(el).text().replace(/\s+/g, ' ').trim();
+      if (/^synopsis\b/i.test(text)) {
+        summary = text.replace(/^synopsis\s*:?\s*/i, '').trim();
+      }
+    });
+    return summary;
+  }
+
+  private parseChapters(
+    $: ReturnType<typeof parseHTML>,
+    novelPath: string,
+  ): Plugin.ChapterItem[] {
+    // Chapter slugs reuse the novel slug (`/web-novels-1/<slug>` ->
+    // `/latest-chapters/<slug>-N`), so match on that prefix to avoid picking
+    // up unrelated chapter links from the page navigation.
+    const slug = novelPath.split('/').filter(Boolean).pop() ?? '';
+    const prefix = `/latest-chapters/${slug}-`;
+    const chapters: Plugin.ChapterItem[] = [];
+    const seen = new Set<string>();
+
+    $(`a[href^="${prefix}"]`).each((_, el) => {
+      const node = $(el);
+      const path = node.attr('href');
+      const name = node.text().replace(/\s+/g, ' ').trim();
+      const number = path?.slice(prefix.length).match(/^(\d+)$/);
+      if (!path || !name || !number || seen.has(path)) return;
+      seen.add(path);
+
+      chapters.push({ name, path, chapterNumber: parseInt(number[1], 10) });
+    });
+
+    return chapters;
+  }
+
+  async popularNovels(pageNo: number): Promise<Plugin.NovelItem[]> {
+    // All web novels are listed on one page.
+    if (pageNo > 1) return [];
+    const html = await this.fetchSiteText(this.site + '/web-novels');
+    return this.parseNovelList(html);
+  }
+
+  async parseNovel(novelPath: string): Promise<Plugin.SourceNovel> {
+    const html = await this.fetchSiteText(this.site + novelPath);
+    const $ = parseHTML(html);
+
+    const novel: Plugin.SourceNovel = {
+      path: novelPath,
+      name: $('h2').first().text().replace(/\s+/g, ' ').trim() || 'Untitled',
+      cover: this.toHttps($('meta[property="og:image"]').attr('content')),
+      summary: this.parseSummary($),
+      chapters: this.parseChapters($, novelPath),
+    };
+
+    return novel;
+  }
+
+  async parseChapter(chapterPath: string): Promise<string> {
+    const html = await this.fetchSiteText(this.site + chapterPath);
+    const $ = parseHTML(html);
+
+    const node = $('.blog-item-content.e-content .sqs-html-content').first();
+    if (!node.length) {
+      // A page without the post body is a real failure, not empty content.
+      throw new Error('Chapter content not found');
+    }
+
+    node.find('script, style').remove();
+    return node.html() ?? '';
+  }
+
+  async searchNovels(
+    searchTerm: string,
+    pageNo: number,
+  ): Promise<Plugin.NovelItem[]> {
+    if (pageNo > 1) return [];
+    const novels = this.parseNovelList(
+      await this.fetchSiteText(this.site + '/web-novels'),
+    );
+    const term = searchTerm.trim().toLowerCase();
+    if (!term) return novels;
+    return novels.filter(novel => novel.name.toLowerCase().includes(term));
+  }
+
+  resolveUrl = (path: string) => this.site + path;
+}
+
+export default new Sylthorian();
diff --git a/public/static/src/en/sylthorian/icon.png b/public/static/src/en/sylthorian/icon.png
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