diff --git a/JS-object-constructors/book-constructor-exercise.js b/JS-object-constructors/book-constructor-exercise.js
new file mode 100644
index 0000000..5ebf4bf
--- /dev/null
+++ b/JS-object-constructors/book-constructor-exercise.js
@@ -0,0 +1,17 @@
+function Book(title, author, pages, isRead) {
+	this.title = title;
+	this.author = author;
+	this.pages = pages;
+	this.isRead = isRead;
+	this.info = function () {
+		if (!isRead) {
+			return `${this.title} by ${this.author}, ${this.pages} pages, not read yet`;
+		} else {
+			return `${this.title} by ${this.author}, ${this.pages} pages, has been read`;
+		}
+	};
+}
+
+const myBook = new Book("Harry Potter", "J. K. Rowling", 495, true);
+
+console.log(myBook.info());
diff --git a/JS-object-constructors/web-banking-assignment.js b/JS-object-constructors/web-banking-assignment.js
new file mode 100644
index 0000000..e8c0ddb
--- /dev/null
+++ b/JS-object-constructors/web-banking-assignment.js
@@ -0,0 +1,35 @@
+"use strict";
+
+function Account(fullname) {
+	this.fullname = fullname;
+	Account.IBAN++;
+	this.IBAN = "GR000" + Account.IBAN;
+	this.balance = 0;
+	this.deposit = function (amount) {
+		return this.balance = this.balance + amount;
+	};
+	this.withdraw = function (amount) {
+    if (typeof amount !== "number" || amount <= 0){
+      return "Error 'Invalid amount'"
+    }
+    if (amount > this.balance) {
+      return "Error 'Insufficient balance!'"
+    }
+		return this.balance = this.balance - amount;
+	};
+	this.getBalance = function () {
+		return this.balance;
+	};
+}
+
+Account.IBAN = 10003;
+
+
+const newAccount = new Account("Kostas Minaidis");
+
+
+newAccount.getBalance(); // 0
+newAccount.deposit(100);
+newAccount.getBalance(); // 100
+newAccount.withdraw(50);
+newAccount.getBalance(); // 50