diff --git a/Example/Example/ViewController.swift b/Example/Example/ViewController.swift
index ef58cdc31..4e9a31728 100755
--- a/Example/Example/ViewController.swift
+++ b/Example/Example/ViewController.swift
@@ -75,9 +75,9 @@ class ViewController: UIViewController {
         }
 
         do {
-            if let image = try FolioReader.getCoverImage(bookPath) {
-                button?.setBackgroundImage(image, for: .normal)
-            }
+            let image = try FolioReader.getCoverImage(bookPath)
+
+            button?.setBackgroundImage(image, for: .normal)
         } catch {
             print(error.localizedDescription)
         }
diff --git a/Source/FolioReaderKit.swift b/Source/FolioReaderKit.swift
index bab91a51d..a4af615d0 100755
--- a/Source/FolioReaderKit.swift
+++ b/Source/FolioReaderKit.swift
@@ -318,15 +318,15 @@ extension FolioReader {
     /**
      Read Cover Image and Return an `UIImage`
      */
-    open class func getCoverImage(_ epubPath: String, unzipPath: String? = nil) throws -> UIImage? {
+    open class func getCoverImage(_ epubPath: String, unzipPath: String? = nil) throws -> UIImage {
         return try FREpubParser().parseCoverImage(epubPath, unzipPath: unzipPath)
     }
 
-    open class func getTitle(_ epubPath: String) throws -> String? {
+    open class func getTitle(_ epubPath: String) throws -> String {
         return try FREpubParser().parseTitle(epubPath)
     }
 
-    open class func getAuthorName(_ epubPath: String) throws-> String? {
+    open class func getAuthorName(_ epubPath: String) throws-> String {
         return try FREpubParser().parseAuthorName(epubPath)
     }
 }