diff --git a/prepare_for_interview.md b/prepare_for_interview.md
index a77971c..a13b1d9 100644
--- a/prepare_for_interview.md
+++ b/prepare_for_interview.md
@@ -14,7 +14,7 @@ Make a sample list of interview questions on different topics: technical, compan
 ### Know your resume
 
 It may sounds strange but the idea here is simple: be ready to answer any question regarding any line you included in your resume.
-Sometimes candidates surprised when they are asked on a skill or line which seems to be not related to the position but the simple truth is: if you mentioned it, it's only fail to ask you about it.
+Sometimes candidates surprised when they are asked on a skill or line which seems to be not related to the position but the simple truth is: if you mentioned something on your resume, it's only fair to ask you about it.
 
 ### Know the company
 
@@ -23,3 +23,7 @@ Be familiar with the company you are interviewing at. Some ideas:
   * What the company does
   * What products it has
   * Major achievements
+
+### Books
+
+From my experience this is not done by many candidates but it's one of the best ways to deep dive into topics like operating system, virtualization, scale, distributed systems, ...