diff --git a/README.md b/README.md
index cef06c4..1c183bd 100644
--- a/README.md
+++ b/README.md
@@ -34,8 +34,9 @@ An updated and curated list of readings to illustrate best practices and pattern
 - [Book](#book)
 
 ## Principle
+* [Lessons from Giant-Scale Services - Eric Brewer, UC Berkeley & Google](https://people.eecs.berkeley.edu/~brewer/papers/GiantScale-IEEE.pdf)
 * [Designs, Lessons and Advice from Building Large Distributed Systems - Jeff Dean, Google](https://www.cs.cornell.edu/projects/ladis2009/talks/dean-keynote-ladis2009.pdf)
-* [How To Design A Good API and Why it Matters - Joshua Bloch, CMU & Google](https://www.infoq.com/presentations/effective-api-design)
+* [How to Design a Good API & Why it Matters - Joshua Bloch, CMU & Google](https://www.infoq.com/presentations/effective-api-design)
 * [On Efficiency, Reliability, Scaling - James Hamilton, VP at AWS](http://mvdirona.com/jrh/work/)
 * [Things to Keep in Mind When Building a Platform for the Enterprise - Heidi Williams, VP Platform at Box](https://blog.box.com/blog/4-things-to-keep-in-mind-when-building-a-platform-for-the-enterprise/)
 * [Principles of Chaos Engineering](https://www.usenix.org/conference/srecon17americas/program/presentation/rosenthal)