diff --git a/database.js b/database.js
index ef76291..569626e 100644
--- a/database.js
+++ b/database.js
@@ -8,6 +8,16 @@ const books = [{
     publication:[1],
     category:["tech", "programing", "education", "triller"],
   },
+  {
+    ISBN:"1234TWO",
+    title:"Say hello to HTML",
+    pubDate:"20201-07-07",
+    language:"en",
+    numPage:250,
+    author:[1, 2],
+    publication:[2],
+    category:["tech", "programing", "education", "triller"],
+  }
 ];
 
 const author = [
@@ -23,12 +33,17 @@ const author = [
   },
 ];
 
-const publication = [
+const publications = [
   {
    id:1,
    name:"Writex",
    books:["1234BOOK"]
-  }
+  },
+  {
+    id:2,
+    name:"Trex",
+    books:[]
+   }
 ];
 
-module.exports = {books, author, publication};
\ No newline at end of file
+module.exports = {books, author, publications};
\ No newline at end of file
diff --git a/index.js b/index.js
index 3d7a72f..4f938ba 100644
--- a/index.js
+++ b/index.js
@@ -7,6 +7,8 @@ const database = require("./database");
 // Initialization
 const booky = express();
 
+//Configuration 
+booky.use(express.json());
 
 /* 
 Route            /
@@ -177,4 +179,118 @@ booky.get("/publication/book/:isbn", (req, res) => {
     return res.json({publication: getSpecificPublication});
 });
 
-booky.listen(3000, () => console.log("Hey  server booting..."));
\ No newline at end of file
+/* 
+Route            /book/add
+Discription      Add new book
+Access           Public
+Parameter        isbn
+Method           POST
+*/
+booky.post("/book/add", (req, res) => {
+    const {newBook} = req.body; // const newBook = req.body.newBook; -> const {newBook} = req.body; --> destructuring
+    database.books.push(newBook);
+    return res.json({ book: database.books });
+});
+
+/* 
+Route            /author/add
+Discription      Add new author
+Access           Public
+Parameter        isbn
+Method           POST
+*/
+booky.post("/author/add", (req, res) => {
+    const {newAuthor} = req.body; 
+    database.author.push(newAuthor);
+    return res.json({ author: database.author });
+});
+
+/* 
+Route            /publication/add
+Discription      Add new author
+Access           Public
+Parameter        isbn
+Method           POST
+*/
+booky.post("/publication/add", (req, res) => {
+    const {newPublication} = req.body; 
+    database.publication.push(newPublication);
+    return res.json({ author: database.publication });
+});
+
+/* 
+Route            /book/update/title
+Discription      Update book title 
+Access           Public
+Parameter        isbn
+Method           PUT
+*/
+booky.put("/book/update/title/:isbn", (req, res) => {
+    database.books.forEach((book) => {
+        if(book.ISBN === req.params.isbn) {
+            book.title = req.body.newBookTitle;
+            return;
+        }
+    });
+
+    return res.json({ book: database.books});
+});
+
+/* 
+Route            /book/update/author
+Discription      Add / update new author for a book
+Access           Public
+Parameter        isbn
+Method           PUT
+*/
+booky.put("/book/update/author/:isbn/:authorId", (req, res) => {
+    //update book database
+    database.books.forEach((book) => {
+        if (book.ISBN === req.params.isbn) {
+          return book.author.push(parseInt(req.params.authorId));
+        }
+      });
+    
+      // update author database
+    
+      database.author.forEach((author) => {
+        if (author.id === parseInt(req.params.authorId))
+          return author.books.push(req.params.isbn);
+      });
+    
+      return res.json({ books: database.books, author: database.author });
+    });
+    
+/* 
+Route            /publication/update/book
+Discription      Update/add books to publications
+Access           Public
+Parameter        isbn
+Method           PUT
+*/
+booky.put("/publication/update/book/:isbn", (req, res) => {
+    //update the publication database
+    database.publications.forEach((publication) => {
+      if (publication.id === req.body.pubId) {
+       return publication.books.push(req.params.isbn);
+      }
+    });
+ 
+   //update book database
+   database.books.forEach((book) => {
+       if (book.ISBN === req.params.isbn) {
+         book.publication = req.body.pubId;
+         return;
+       }
+   });
+ 
+   return res.json({ 
+       books: database.books, 
+       publications: database.publications, 
+       message: "Successfully updated the publication", 
+     });
+ });
+
+booky.listen(3000, () => console.log("Hey  server booting..."));
+
+//HTTP client -> helper who helps you to make http request
\ No newline at end of file
diff --git a/requirements.js b/requirements.js
index e06eb3a..ca0b0d4 100644
--- a/requirements.js
+++ b/requirements.js
@@ -13,6 +13,7 @@
 
 // What are all the APIs that we need.....
 
+//GET
 // Books
 // We need an API
 // to get all books ✅
@@ -20,16 +21,53 @@
 // to get list of books based on category✅
 // to get list of books based on languages [task]✅
 
+//POST ->to send data
+//Add new book✅
+
+//PUT -> update
+//Update book title ✅
+//Add / update new author✅
+
+//DELETE
+//Delete a book
+//Delete an author
+
 // Authors
 
+//GET
 // We need an api
 // to get all authors✅
 // to get specific authors [task]✅
 // to get list of authors based on books ✅
 
+// POST
+// Add new author✅
+
+// PUT
+// Update Author name using it's id [Task] ✅
+
+// DELETE
+// Delete an author
+
+
 // Publications
 
+//GET
 // we need an API
 // to get all publication  ✅
 // to get specific publication [task] ✅
-// to get list of publication based on book [task] ✅
\ No newline at end of file
+// to get list of publication based on book [task] ✅
+
+// POST
+// Add new publications [Task] 🚀
+
+// PUT
+// UPdate the publication name using it's id [Task] 🚀
+// update/add books to publications
+
+// DELETE
+// Delete the publication
+// delete a book from publication.
+
+
+//How the server serves the request
\ No newline at end of file