diff --git a/src/main/java/cracking/the/code/interview/chapter4/BinaryTree.java b/src/main/java/cracking/the/code/interview/chapter4/BinaryTree.java
index e1375a3..056b1b7 100644
--- a/src/main/java/cracking/the/code/interview/chapter4/BinaryTree.java
+++ b/src/main/java/cracking/the/code/interview/chapter4/BinaryTree.java
@@ -21,14 +21,30 @@ public Node insert(Node root, int v) {
             return root;
         }
 
-        if (v <= root.value)
+        if (v < root.value)
             root.left = insert(root.left, v);
-        else
+        else if (v > root.value)
             root.right = insert(root.right, v);
 
         return root;
     }
 
+    public Node search(Node root, int v) {
+
+        if (root == null) {
+            throw new RuntimeException(v + " Not found.");
+        }
+
+        if (v == root.value) {
+            return root;
+        }else if (v < root.value ) {
+            return search(root.left, v);
+        } else {
+            return search(root.right, v);
+        }
+
+    }
+
     public void inOrderTraversal(Node n) {
         if (n != null) {
             inOrderTraversal(n.left);
diff --git a/src/test/java/cracking/the/code/interview/chapter4/BinaryTreeTest.java b/src/test/java/cracking/the/code/interview/chapter4/BinaryTreeTest.java
index 6014640..8771c7a 100644
--- a/src/test/java/cracking/the/code/interview/chapter4/BinaryTreeTest.java
+++ b/src/test/java/cracking/the/code/interview/chapter4/BinaryTreeTest.java
@@ -15,9 +15,13 @@ public void test() {
         binaryTree.insert(root, 2);
         binaryTree.insert(root, 1);
         binaryTree.insert(root, 6);
+        binaryTree.insert(root, 6); //(it should not allow to repeat)
         binaryTree.insert(root, 20);
 
         binaryTree.inOrderTraversal(root);
+
+        var v = binaryTree.search(root, 8);
+        System.out.println(v.value + " Found.");
     }
 
 }