diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -3,3 +3,7 @@
 My roadmap for becoming competent quant and capable of creating automated trading bots.
 
 Current Goal: **Learn Quantitative Foundations**
+
+## Study
+
+Current reading [Introduction to Probability, Statistics, and Random Processes - Hossein Pishro-Nik](./study/001_introduction-to-probability-statistics-and-random-processes/textbooks/Introduction%20to%20Probability,%20Statistics,%20and%20Random%20Processes%20-%20Hossein%20Pishro-Nik.pdf)
diff --git a/study/001_introduction-to-probability-statistics-and-random-processes/README.md b/study/001_introduction-to-probability-statistics-and-random-processes/README.md
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 # Introduction to Probability, Statistics, and Random Processes - Hossein Pishro-Nik
 
+[pdf](./textbooks/Introduction%20to%20Probability,%20Statistics,%20and%20Random%20Processes%20-%20Hossein%20Pishro-Nik.pdf)
+
 total pages=1007
 
 **Currently reading:** chapter 3, page 157