fix book

src/imports/utils.py

@@ -359,12 +359,12 @@ class Book:
             if self._message:
                 await self._message.edit(content=None, embed=self._pages[self._current_page])
             else:
-                await self._channel.send(embed=self._pages[self._current_page])
+                self._message = await self._channel.send(embed=self._pages[self._current_page])
         else:
             if self._message:
                 await self._message.edit(content=self._pages[self._current_page], embed=None)
             else:
-                await self._channel.send(self._pages[self._current_page])
+                self._message = await self._channel.send(self._pages[self._current_page])
 
     async def create_book(self) -> None:
         # noinspection PyUnresolvedReferences