gnu: Add emacs-nov.

* gnu/packages/emacs.scm (emacs-nov): New variable.

gnu/packages/emacs.scm

@@ -3581,6 +3581,41 @@ (define-public emacs-esxml
 xml-related libraries.")
     (license license:gpl3+)))
 
+(define-public emacs-nov
+  (package
+    (name "emacs-nov")
+    (version "0.2.2")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://github.com/wasamasa/nov.el/archive/"
+                    version ".tar.gz"))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "0pc07cr2qfa66pxyxhvgrxiwssykisj25yjxvx3qr4v7bp5qmms7"))))
+    (build-system emacs-build-system)
+    (propagated-inputs
+     `(("emacs-dash" ,emacs-dash)
+       ("emacs-esxml" ,emacs-esxml)))
+    (home-page "https://github.com/wasamasa/nov.el")
+    (synopsis "Major mode for reading EPUB files in Emacs")
+    (description
+     "This package provides a major mode for reading EPUB documents.
+Features:
+@itemize
+@item Basic navigation (jump to table of contents (TOC), previous/next chapter)
+@item Remembering and restoring the last read position
+@item Jump to next chapter when scrolling beyond end
+@item Renders EPUB2 (.ncx) and EPUB3 (<nav>) TOCs
+@item Hyperlinks to internal and external targets
+@item Supports textual and image documents
+@item View source of document files
+@item Metadata display
+@item Image rescaling
+@end itemize\n")
+    (license license:gpl3+)))
+
 (define-public emacs-queue
   (package
     (name "emacs-queue")