diff --git a/ml1/2_3_0_Visualisation.ipynb b/ml1/2_3_0_Visualisation.ipynb
index a06917b..6138165 100644
--- a/ml1/2_3_0_Visualisation.ipynb
+++ b/ml1/2_3_0_Visualisation.ipynb
@@ -228,7 +228,6 @@
    "source": [
     "* [Feature selection](http://scikit-learn.org/stable/modules/feature_selection.html)\n",
     "* [Classification probability](http://scikit-learn.org/stable/auto_examples/classification/plot_classification_probability.html)\n",
-    "* [Mastering Pandas](https://learning.oreilly.com/library/view/mastering-pandas/9781789343236/), Femi Anthony, Packt Publishing, 2015.\n",
     "* [Matplotlib web page](http://matplotlib.org/index.html)\n",
     "* [Using matlibplot in IPython](http://ipython.readthedocs.org/en/stable/interactive/plotting.html)\n",
     "* [Seaborn Tutorial](https://stanford.edu/~mwaskom/software/seaborn/tutorial.html)\n",