From 399ee8d2e72b737307ff3dc417f3148868d8ec12 Mon Sep 17 00:00:00 2001
From: ta264 <ta264@users.noreply.github.com>
Date: Tue, 6 Apr 2021 21:28:13 +0100
Subject: [PATCH] Fixed: Book files disappearing

---
 src/NzbDrone.Core/Books/Services/RefreshBookService.cs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/NzbDrone.Core/Books/Services/RefreshBookService.cs b/src/NzbDrone.Core/Books/Services/RefreshBookService.cs
index 1781adfac..d00963bf9 100644
--- a/src/NzbDrone.Core/Books/Services/RefreshBookService.cs
+++ b/src/NzbDrone.Core/Books/Services/RefreshBookService.cs
@@ -302,9 +302,8 @@ namespace NzbDrone.Core.Books
                 return;
             }
 
-            var toMonitor = monitored.OrderByDescending(x => _mediaFileService.GetFilesByEdition(x.Id).Count)
-                .ThenByDescending(x => x.Ratings.Popularity)
-                .First();
+            var toMonitor = monitored.OrderByDescending(x => x.Id > 0 ? _mediaFileService.GetFilesByEdition(x.Id).Count : 0)
+                .ThenByDescending(x => x.Ratings.Popularity).First();
 
             monitored.ForEach(x => x.Monitored = false);
             toMonitor.Monitored = true;