diff --git a/google-isbn.cabal b/google-isbn.cabal
--- a/google-isbn.cabal
+++ b/google-isbn.cabal
@@ -2,10 +2,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 1e1e64f60e4f08b7103b3d444a76b6af01b0f53da482e070e9a65de401bd499a
+-- hash: da24bcfc0b9e1213e062884e57d60ff7c9cfd60753d980885e890bebd3b1b9f2
 
 name:           google-isbn
-version:        1.0.0
+version:        1.0.1
 description:    Basic utility to search an ISBN using the Google Books webservice
 category:       Text, Web
 homepage:       https://github.com/apeyroux/google-isbn#readme
@@ -23,6 +23,7 @@
 library
   exposed-modules:
       Google.ISBN
+      Main
   other-modules:
       Paths_google_isbn
   hs-source-dirs:
diff --git a/src/Google/ISBN.hs b/src/Google/ISBN.hs
--- a/src/Google/ISBN.hs
+++ b/src/Google/ISBN.hs
@@ -10,7 +10,7 @@
 --
 
 module Google.ISBN (
-  ISBN
+  ISBN (..)
   , GoogleISBN (..)
   , Book (..)
   , googleISBN
diff --git a/src/Main.hs b/src/Main.hs
new file mode 100644
--- /dev/null
+++ b/src/Main.hs
@@ -0,0 +1,8 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module Main where
+
+import Google.ISBN
+
+main :: IO ()
+main = googleISBN (ISBN "ok") >>= print