diff --git a/debugging/book-library/index.html b/debugging/book-library/index.html
index 23acfa7..a277b2f 100644
--- a/debugging/book-library/index.html
+++ b/debugging/book-library/index.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
   <head>
-    <title> </title>
+    <title> Book-Library </title>
     <meta
       charset="utf-8"
       name="viewport"
@@ -47,7 +47,7 @@ <h1>Library</h1>
         />
         <label for="pages">Pages:</label>
         <input
-          type="number"
+          type="number" min="1" step="1"
           class="form-control"
           id="pages"
           name="pages"
diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 75ce6c1..f9943e2 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -31,14 +31,16 @@ function submit() {
   if (
     title.value == null ||
     title.value == "" ||
-    pages.value == null ||
+    author.value === "" ||
+    parseInt(pages.value) <=0 ||
+    isNaN(pages.value) ||
     pages.value == ""
   ) {
     alert("Please fill all fields!");
     return false;
   } else {
-    let book = new Book(title.value, title.value, pages.value, check.checked);
-    library.push(book);
+    let book = new Book(title.value, author.value, pages.value, check.checked);
+    myLibrary.push(book);
     render();
   }
 }
@@ -54,7 +56,7 @@ function render() {
   let table = document.getElementById("display");
   let rowsNumber = table.rows.length;
   //delete old table
-  for (let n = rowsNumber - 1; n > 0; n-- {
+  for (let n = rowsNumber - 1; n > 0; n--) {
     table.deleteRow(n);
   }
   //insert updated row and cells
@@ -77,9 +79,10 @@ function render() {
     wasReadCell.appendChild(changeBut);
     let readStatus = "";
     if (myLibrary[i].check == false) {
-      readStatus = "Yes";
+      readStatus = "NO";
+      changeBut.style.backgroundColor = "red"
     } else {
-      readStatus = "No";
+      readStatus = "Yes";
     }
     changeBut.innerText = readStatus;
 
@@ -89,12 +92,12 @@ function render() {
     });
 
     //add delete button to every row and render again
-    let delButton = document.createElement("button");
+    let delBut = document.createElement("button");
     delBut.id = i + 5;
     deleteCell.appendChild(delBut);
     delBut.className = "btn btn-warning";
     delBut.innerHTML = "Delete";
-    delBut.addEventListener("clicks", function () {
+    delBut.addEventListener("click", function () {
       alert(`You've deleted title: ${myLibrary[i].title}`);
       myLibrary.splice(i, 1);
       render();
