diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # Revision history for polyvariadic
 
+## 0.3.0.2  -- 2017-12-19
+
+* Added readme to extra-source-files so it shows up on hackage
+
 ## 0.3.0.0  -- 2017-04-19
 
 * First public version.
diff --git a/README.md b/README.md
new file mode 100644
--- /dev/null
+++ b/README.md
@@ -0,0 +1,37 @@
+# polyvariadic
+
+**Creation and application of polyvariadic functions**
+
+[![Build Status](https://travis-ci.org/fgaz/polyvariadic.svg?branch=master)](https://travis-ci.org/fgaz/polyvariadic)
+[![Hackage](https://img.shields.io/hackage/v/polyvariadic.svg)](https://hackage.haskell.org/package/polyvariadic)
+
+For example, the classic printf:
+
+```haskell
+{-# LANGUAGE MultiParamTypeClasses #-}
+{-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE FlexibleContexts #-}
+import Data.Function.Polyvariadic
+import Data.Accumulator
+
+magicChar = '%'
+notMagicChar = (/= magicChar)
+
+data PrintfAccum = PrintfAccum { done :: String, todo :: String }
+
+instance Show x => Accumulator PrintfAccum x where
+  accumulate x (PrintfAccum done (_:todo)) = PrintfAccum
+                                              (done ++ show x ++ takeWhile notMagicChar todo)
+                                              (dropWhile notMagicChar todo)
+  accumulate _ acc = acc
+
+printf' str = polyvariadic
+               (PrintfAccum (takeWhile notMagicChar str) (dropWhile notMagicChar str))
+               done
+```
+
+```haskell
+>>> printf' "aaa%bbb%ccc%ddd" "TEST" 123 True
+"aaa\"TEST\"bbb123cccTrueddd"
+```
+
diff --git a/polyvariadic.cabal b/polyvariadic.cabal
--- a/polyvariadic.cabal
+++ b/polyvariadic.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                polyvariadic
-version:             0.3.0.1
+version:             0.3.0.2
 synopsis:            Creation and application of polyvariadic functions
 description:         Creation and application of polyvariadic functions, see the docs for usage and examples
 homepage:            https://github.com/fgaz/polyvariadic
@@ -14,6 +14,7 @@
 category:            Data
 build-type:          Simple
 extra-source-files:  ChangeLog.md
+                   , README.md
 cabal-version:       >=1.10
 
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