diff --git a/free-programming-books-ja.md b/free-programming-books-ja.md
index 4d26b455c..e805cef2b 100644
--- a/free-programming-books-ja.md
+++ b/free-programming-books-ja.md
@@ -73,6 +73,7 @@
 * [Standard ML](#standard-ml)
 * [Swift](#swift)
 * [Tcl/Tk](#tcltk)
+* [Theoretical Computer Science](#theoretical-computer-science)
 * [TypeScript](#typescript)
 * [VBA](#vba)
 * [Vim](#vim)
@@ -649,6 +650,11 @@
 * [Tcl/Tk入門](http://aoba.cc.saga-u.ac.jp/lecture/TclTk/text.pdf) - 只木進一 (PDF)
 
 
+### Theoretical Computer Science
+
+* [計算機プログラムの構造と解釈 第二版](https://sicp.iijlab.net/fulltext/xcont.html) - Alan J. Perlis 
+
+
 ### TypeScript
 
 * [TypeScript Deep Dive 日本語版](https://typescript-jp.gitbook.io/deep-dive/) - basarat, yohamta(翻訳)