diff --git a/api/models/books.js b/api/models/books.js
new file mode 100644
index 0000000..9fa3e63
--- /dev/null
+++ b/api/models/books.js
@@ -0,0 +1,17 @@
+const mongoose = require('mongoose');
+
+const schema = new mongoose.Schema({
+    title: {
+        type: String,
+        required: true
+    },
+    published: Number,
+    authors: [{
+        name: String,
+        dob: Number
+    }]
+    }, {
+    timestamps: { createdAt: 'created_at', updatedAt: 'updated_at' }
+});
+
+module.exports = mongoose.model('Books', schema)
\ No newline at end of file
diff --git a/api/routes/books.authors.js b/api/routes/books.authors.js
new file mode 100644
index 0000000..70d8e5a
--- /dev/null
+++ b/api/routes/books.authors.js
@@ -0,0 +1,55 @@
+const router = require('express').Router({mergeParams: true})
+const Books = require('../models/books')
+
+
+router.get('/', async (req, res, next) => {
+  const status = 200
+  const {authors} = await Books.findById(req.params.bookId).select('authors')
+  
+  res.json({ status, authors })
+})
+
+router.post('/', async (req, res, next) => {
+  const status = 201
+  const books = await Books.findById(req.params.bookId)
+  
+  books.authors.push(req.body)
+  await books.save()// ok, it updates an existing document or inserts a new document, depending on its document parameter.
+
+  const author = books.authors[books.authors.length -1]
+  res.json({ status, author }) 
+  // ok, so res.status(status) is declaring that the current status of res is "status", and the .json() parses that data as JSON. 
+})
+
+router.get('/:id', async (req, res, next) => {
+  const status = 200
+  const {authors} = await Books.findById(req.params.bookId).select('authors')
+  const author = authors.id(req.params.id)
+
+  res.json({ status, author })
+})
+
+router.put('/:id', async (req, res, next) => {
+  const status = 200
+  const books = await Books.findById(req.params.bookId)
+  const author = books.authors.id(req.params.id)
+  //here "id" is the name of the parameter, and we are identifying the id of the author through the param that we specify. Could you break this down a little? It has some layers I am not following.
+  Object.assign(author, req.body)
+  // ok, so "author" is the target, and "req.body" is the source. We are forever changing "author" by copying/adding the properties from "req.body" to "author"
+  await books.save()
+  
+  res.status(status).json({ status, author });
+})
+
+router.delete('/:id', async (req, res, next) => {
+  const status = 200
+  const books = await Books.findById(req.params.bookId)
+  const author = books.authors.id(req.params.id).remove()
+  await books.save()
+
+  res.status(status).json({ status, author });
+})
+
+module.exports = router
+
+// I am confused about needing this file, because I was able to update the author name before exicuting this code. UPDATE: Nope, i actually was NOT able to do this before this code. Still confused on why I cannot GET /api/books/:bookId/authors/:authorId
\ No newline at end of file
diff --git a/api/routes/books.js b/api/routes/books.js
index 10a56a9..918de98 100644
--- a/api/routes/books.js
+++ b/api/routes/books.js
@@ -1,5 +1,6 @@
 const router = require('express').Router()
 const { generate: generateId } = require('shortid')
+const Books = require('../models/books')
 
 const books = [
   {
@@ -26,48 +27,72 @@ const books = [
   }
 ];
 
-router.get('/', (req, res, next) => {
+router.get('/', async (req, res, next) => {
   const status = 200
-  const response = books
+  const response = await Books.find(req.query).select('_id title published authors')
   
   res.json({ status, response })
 })
 
-router.post('/', (req, res, next) => {
+router.post('/', async (req, res, next) => {
   const status = 201
-  
-  books.push({ id: generateId(), ...req.body })
-  const response = books
-  
-  res.json({ status, response })
+  try {
+    const response = await Books.create(req.body)
+    res.json({ status, response })
+
+  } catch (error) {
+    error.status = 400
+    error.message = 'Invalid data. Please try again.'
+    
+    next(error)
+  }
+
 })
 
-router.get('/:id', (req, res, next) => {
+router.get('/:id', async (req, res, next) => {
   const status = 200
-  const response = books.find(({ id }) => id === req.params.id)
+  const response = await Books.findById(req.params.id).select('_id title published authors')
 
   res.json({ status, response })
 })
 
-router.put('/:id', (req, res, next) => {
+router.put('/:id', async (req, res, next) => {
   const status = 200
-  const response = { id: req.params.id, ...req.body }
-  const single = books.find(({ id }) => id === req.params.id)
-  const index = books.indexOf(single)
-
-  books.splice(index, 1, response)
+  const query = {_id:req.params.id}
+  const options = {new:true}
+  const response = await Books.findOneAndUpdate(query, req.body, options)
   
   res.json({ status, response })
 })
 
-router.delete('/:id', (req, res, next) => {
+router.delete('/:id', async (req, res, next) => {
   const status = 200
-  const response = books.find(({ id }) => id === req.params.id)
-  const index = books.indexOf(response)
-
-  books.splice(index, 1)
+  const response = await Books.findOneAndDelete({ _id: req.params.id })
 
   res.json({ status, response })
 })
 
+// router.get('/:bookId/authors/:id', async (req, res, next) => {
+//   const status = 200
+//   const response = await Books.authors.findById(req.params.id)
+
+//   res.json({ status, response })
+// })
+
+// router.put('/:bookId/authors/:id', async (req, res, next) => {
+//   const status = 200
+//   const query = {_id:req.params.id}
+//   const options = {new:true}
+//   const response = await Books.authors.findOneAndUpdate(query, req.body, options)
+  
+//   res.json({ status, response })
+// })
+
+// router.delete('/:bookId/authors/:id', async (req, res, next) => {
+//   const status = 200
+//   const response = await Books.authors.findOneAndDelete({ _id: req.params.id })
+
+//   res.json({ status, response })
+// })
+
 module.exports = router
\ No newline at end of file
diff --git a/app.js b/app.js
index 075ce75..e6cc5a2 100644
--- a/app.js
+++ b/app.js
@@ -5,7 +5,7 @@ const app = express()
 
 // Database Connection
 if (MONGO_DB_CONNECTION) {
-  mongoose.connect(MONGO_DB_CONNECTION, { useNewUrlParser: true })
+  mongoose.connect(MONGO_DB_CONNECTION, { useNewUrlParser: true, useFindAndModify: false })
   console.log('Connected to database...')
 } else {
   console.log('Could not connect to database!')
@@ -17,6 +17,7 @@ app.use(require('body-parser').json())
 
 // Routes
 app.use('/api/books', require('./api/routes/books'))
+app.use('/api/books/:bookId/authors', require('./api/routes/books.authors'))
 
 // Not Found Handler
 app.use((req, res, next) => {
diff --git a/package.json b/package.json
index af470f9..501b171 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
   "description": "",
   "main": "app.js",
   "scripts": {
+    "debug": "PORT=5000 node --inspect app.js",
     "dev": "nodemon app.js"
   },
   "keywords": [],