diff --git a/README.md b/README.md
index 241e18b..bf196ad 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ See [paper.md](paper.md) file for statement of need.
 
 ## Notebook mapping with corresponding book chapter
 
-Note: If book chapter is missing, texbook doesn't provide one on the topic
+Note: If book chapter is missing, texbook doesn't provide one on the topic; all the notebooks are in **notebooks** folder
 
 | Notebook -> | Think Python3 Textbook |
 | ---------   | ---------- |
@@ -48,7 +48,12 @@ Note: If book chapter is missing, texbook doesn't provide one on the topic
 
 ## PDF Format
 
-- pdf version of all the notebooks can be found in [pdfs](https://github.com/rambasnet/Python-Notebooks/tree/master/pdfs) folder
+- pdf version of all the notebooks can be generated using the following script from a Terminal on Linux system
+- PDF file for each notebook file will be generated and stored in ./pdfs folder
+
+```bash
+bash generatepdfs.sh
+```
 
 ## Who can use these notebooks
 
@@ -118,3 +123,4 @@ Contributions are accepted via pull requests. You can also open issues on bugs,
 © 2019 Ram Basnet and T. Doleck. Permission is granted to copy, distribute and/or modify this document
 under the terms of the GNU Free Documentation License, Version 1.3
 or any later version published by the Free Software Foundation. See LICENSE file for details.
+
diff --git a/countdown.py b/demos/countdown.py
similarity index 100%
rename from countdown.py
rename to demos/countdown.py
diff --git a/generatepdfs.sh b/generatepdfs.sh
new file mode 100644
index 0000000..f144e99
--- /dev/null
+++ b/generatepdfs.sh
@@ -0,0 +1,12 @@
+#! /bin/bash
+
+# Script to convert jupyter notebooks to PDF files. The pdfs are saved in ./pdfs folder
+
+sudo apt update
+sudo apt install -y pandoc texlive texlive-xetex > /dev/null
+
+files=$(find . -name '*.ipynb')
+for f in $files; do
+    echo Converting: $f
+    jupyter nbconvert --log-level=0 --output-dir='./pdfs' --to pdf $f > /dev/null
+done
diff --git a/integers.txt b/integers.txt
deleted file mode 100644
index c2069b5..0000000
--- a/integers.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-462
-298
-188
-560
-431
-279
-488
-173
-160
-502
diff --git a/Ch00-IntroCourseTableOfContents.ipynb b/notebooks/Ch00-IntroCourseTableOfContents.ipynb
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diff --git a/Ch01-Introduction.ipynb b/notebooks/Ch01-Introduction.ipynb
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diff --git a/Ch02-1-Data-Variables-StdIO.ipynb b/notebooks/Ch02-1-Data-Variables-StdIO.ipynb
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diff --git a/Ch03-1-Functions-Built-in.ipynb b/notebooks/Ch03-1-Functions-Built-in.ipynb
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diff --git a/Ch03-3-Functions-UserDefined.ipynb b/notebooks/Ch03-3-Functions-UserDefined.ipynb
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diff --git a/Ch03-6-Functions-Advanced.ipynb b/notebooks/Ch03-6-Functions-Advanced.ipynb
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diff --git a/Ch04-Conditionals.ipynb b/notebooks/Ch04-Conditionals.ipynb
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diff --git a/Ch05-Iterations.ipynb b/notebooks/Ch05-Iterations.ipynb
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diff --git a/Ch06-Strings.ipynb b/notebooks/Ch06-Strings.ipynb
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diff --git a/Ch07-Tuples.ipynb b/notebooks/Ch07-Tuples.ipynb
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diff --git a/Ch08-1-Lists.ipynb b/notebooks/Ch08-1-Lists.ipynb
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diff --git a/Ch09-1-Dictionaries.ipynb b/notebooks/Ch09-1-Dictionaries.ipynb
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diff --git a/Ch09-2-Built-in-DataStructures.ipynb b/notebooks/Ch09-2-Built-in-DataStructures.ipynb
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diff --git a/Ch10-1-Files.ipynb b/notebooks/Ch10-1-Files.ipynb
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diff --git a/Ch11-Turtles-Events.ipynb b/notebooks/Ch11-Turtles-Events.ipynb
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diff --git a/Ch12-ModulesAndPackages.ipynb b/notebooks/Ch12-ModulesAndPackages.ipynb
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diff --git a/Ch13-Recursion.ipynb b/notebooks/Ch13-Recursion.ipynb
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diff --git a/Ch14-OOP.ipynb b/notebooks/Ch14-OOP.ipynb
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diff --git a/Ch15-Overloading-Polymorphism.ipynb b/notebooks/Ch15-Overloading-Polymorphism.ipynb
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diff --git a/Ch16-Exceptions.ipynb b/notebooks/Ch16-Exceptions.ipynb
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diff --git a/Ch17-PyGame.ipynb b/notebooks/Ch17-PyGame.ipynb
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diff --git a/Ch18-Inheritance.ipynb b/notebooks/Ch18-Inheritance.ipynb
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diff --git a/Ch19-UnitTest.ipynb b/notebooks/Ch19-UnitTest.ipynb
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diff --git a/Ch20-LinkedLists.ipynb b/notebooks/Ch20-LinkedLists.ipynb
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diff --git a/Ch21-Stacks.ipynb b/notebooks/Ch21-Stacks.ipynb
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diff --git a/Ch22-Queues.ipynb b/notebooks/Ch22-Queues.ipynb
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diff --git a/Ch23-Trees.ipynb b/notebooks/Ch23-Trees.ipynb
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diff --git a/Ch24-CodeOptimization-ExecutionTime.ipynb b/notebooks/Ch24-CodeOptimization-ExecutionTime.ipynb
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diff --git a/Ch25-DynamicProgramming.ipynb b/notebooks/Ch25-DynamicProgramming.ipynb
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diff --git a/Ch26-SqliteDB.ipynb b/notebooks/Ch26-SqliteDB.ipynb
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diff --git a/test b/test
deleted file mode 100644
index e69de29..0000000
diff --git a/test1.txt b/test1.txt
deleted file mode 100644
index 8f48a1d..0000000
--- a/test1.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-words
-=====
-apple
-ball
-cat
-dog
-zebra
diff --git a/words.txt b/words.txt
deleted file mode 100644
index a982667..0000000
--- a/words.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-apple
-ball
-cat
-dog
-elephant
-zebra
-1
-[1, 2, 3]
\ No newline at end of file
diff --git a/words1.txt b/words1.txt
deleted file mode 100644
index 0338983..0000000
--- a/words1.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-1
-[1, 2, 3]apple
-ball
-cat
-dog
-elephant
-zebra