doc update

Author: mtumilowicz

README.md

@@ -1,2 +1,12 @@
 # java11-concurrency-lock-execute-around-method-pattern
-_Reference_: https://www.amazon.com/gp/product/1937785467
+Example of Execute Around Method pattern.
+
+# preface
+For details about `ReadWriteLock` please refer my other
+github project: https://github.com/mtumilowicz/java-concurrency-readwritelock
+
+In this project we will show how to use Execute Around Method 
+(EAM) pattern to wrap critical sections and minimise the pain
+of working with the `ReadWriteLock` interface.
+
+# project description