--- alexandria-book-collection-manager-0.7.4/lib/alexandria/library_store.rb.broken_yaml	2019-10-25 01:20:07.000000000 +0900
+++ alexandria-book-collection-manager-0.7.4/lib/alexandria/library_store.rb	2020-01-03 17:38:07.340338529 +0900
@@ -48,8 +48,23 @@ module Alexandria
         Dir["*" + Library::EXT[:book]].each do |filename|
           test[1] = filename if (test[0]).zero?
 
+          book_valid_p = true
+
           unless File.size? test[1]
             log.warn { "Book file #{test[1]} was empty" }
+            book_valid_p = false
+          end
+
+          if book_valid_p
+            begin
+              book = regularize_book_from_yaml(test[1])
+            rescue Psych::SyntaxError => e
+              log.warn "Book file #{test[1]} could not be parsed"
+              book_valid_p = false
+            end
+          end
+
+          if not book_valid_p
             md = /([\dxX]{10,13})#{Library::EXT[:book]}/.match(filename)
             if md
               file_isbn = md[1]
@@ -60,7 +75,7 @@ module Alexandria
             end
             next
           end
-          book = regularize_book_from_yaml(test[1])
+
           old_isbn = book.isbn
           old_pub_year = book.publishing_year
           begin
@@ -193,6 +208,8 @@ module Alexandria
 
       # TODO: Ensure book loading passes through Book#initialize
       book = YAML.safe_load(text, permitted_classes: [Book, Time])
+      # TODO: Need check if this can be removed
+      # book = YAML.load(Syck::unescape(text))
 
       unless book.isbn.class == String
         # HACK