diff --git a/routes/api/v1/authors_add_update.go b/routes/api/v1/authors_add_update.go
index 8819baa..bbc71a2 100644
--- a/routes/api/v1/authors_add_update.go
+++ b/routes/api/v1/authors_add_update.go
@@ -7,6 +7,7 @@ import (
 	"github.com/labstack/echo"
 	"net/http"
 	"strings"
+	"strconv"
 )
 
 type authorPayload struct {
@@ -17,7 +18,7 @@ type authorPayload struct {
 func AuthorAddOrUpdate(c echo.Context) error {
 	// Check for Request Content
 	authorFromString := c.FormValue("author")
-	var authorToInsert models.Author
+	var datAuthor models.Author
 
 	if authorFromString == "" {
 		b := new(authorPayload)
@@ -25,11 +26,11 @@ func AuthorAddOrUpdate(c echo.Context) error {
 			fmt.Println(err)
 			return c.JSON(http.StatusBadRequest, models.Message{"No author model provided"})
 		}
-		authorToInsert = b.Author
+		datAuthor = b.Author
 	} else {
 		// Decode the JSON
 		dec := json.NewDecoder(strings.NewReader(authorFromString))
-		err := dec.Decode(&authorToInsert)
+		err := dec.Decode(&datAuthor)
 
 		if err != nil {
 			return c.JSON(http.StatusInternalServerError, models.Message{"Error decoding author: " + err.Error()})
@@ -37,12 +38,24 @@ func AuthorAddOrUpdate(c echo.Context) error {
 	}
 
 	// Check if we have at least a Lastname
-	if authorToInsert.Lastname == "" && authorToInsert.Forename == "" {
+	if datAuthor.Lastname == "" && datAuthor.Forename == "" {
 		return c.JSON(http.StatusBadRequest, models.Message{"Please provide at least one name."})
 	}
+	
+	// Check if we have an ID other than the one in the struct
+	id := c.Param("id")
+	if id != "" {
+		// Make int
+		authorID, err := strconv.ParseInt(id, 10, 64)
 
-	// Insert the author
-	newAuthor, err := models.AddOrUpdateAuthor(authorToInsert)
+		if err != nil {
+			return c.JSON(http.StatusInternalServerError, models.Message{"Could not get book id"})
+		}
+		datAuthor.ID = authorID
+	}
+
+	// Insert or update the author
+	newAuthor, err := models.AddOrUpdateAuthor(datAuthor)
 
 	if err != nil {
 		return c.JSON(http.StatusInternalServerError, models.Message{"Error"})
diff --git a/routes/api/v1/books_add_update.go b/routes/api/v1/books_add_update.go
index dfe300a..d254684 100644
--- a/routes/api/v1/books_add_update.go
+++ b/routes/api/v1/books_add_update.go
@@ -7,6 +7,7 @@ import (
 	"github.com/labstack/echo"
 	"net/http"
 	"strings"
+	"strconv"
 )
 
 type bookPayload struct {
@@ -17,7 +18,7 @@ type bookPayload struct {
 func BookAddOrUpdate(c echo.Context) error {
 	// Check for Request Content
 	bookFromString := c.FormValue("book")
-	var bookToInsert models.Book
+	var datBook models.Book
 
 	if bookFromString == "" {
 		b := new(bookPayload)
@@ -25,24 +26,36 @@ func BookAddOrUpdate(c echo.Context) error {
 			fmt.Println(err)
 			return c.JSON(http.StatusBadRequest, models.Message{"No book model provided"})
 		}
-		bookToInsert = b.Book
+		datBook = b.Book
 	} else {
 		// Decode the JSON
 		dec := json.NewDecoder(strings.NewReader(bookFromString))
-		err := dec.Decode(&bookToInsert)
+		err := dec.Decode(&datBook)
 
 		if err != nil {
 			return c.JSON(http.StatusInternalServerError, models.Message{"Error decoding book: " + err.Error()})
 		}
 	}
 
+	// Check if we have an ID other than the one in the struct
+	id := c.Param("id")
+	if id != "" {
+		// Make int
+		bookID, err := strconv.ParseInt(id, 10, 64)
+
+		if err != nil {
+			return c.JSON(http.StatusInternalServerError, models.Message{"Could not get book id"})
+		}
+		datBook.ID = bookID
+	}
+
 	// Check if we have at least a title
-	if bookToInsert.Title == "" {
+	if datBook.Title == "" {
 		return c.JSON(http.StatusBadRequest, models.Message{"You need at least a title to insert a new book!"})
 	}
 
-	// Insert the book
-	newBook, err := models.AddOrUpdateBook(bookToInsert)
+	// Insert or update the book
+	newBook, err := models.AddOrUpdateBook(datBook)
 
 	if err != nil {
 		return c.JSON(http.StatusInternalServerError, models.Message{"Error"})
diff --git a/routes/api/v1/publishers_add_update.go b/routes/api/v1/publishers_add_update.go
index 4567237..0f44150 100644
--- a/routes/api/v1/publishers_add_update.go
+++ b/routes/api/v1/publishers_add_update.go
@@ -7,6 +7,7 @@ import (
 	"github.com/labstack/echo"
 	"net/http"
 	"strings"
+	"strconv"
 )
 
 type publisherPayload struct {
@@ -17,7 +18,7 @@ type publisherPayload struct {
 func PublisherAddOrUpdate(c echo.Context) error {
 	// Check for Request Content
 	publisherFromString := c.FormValue("publisher")
-	var publisherToInsert models.Publisher
+	var datPublisher models.Publisher
 
 	if publisherFromString == "" {
 		b := new(publisherPayload)
@@ -25,19 +26,32 @@ func PublisherAddOrUpdate(c echo.Context) error {
 			fmt.Println(err)
 			return c.JSON(http.StatusBadRequest, models.Message{"No publisher model provided"})
 		}
-		publisherToInsert = b.Publisher
+		datPublisher = b.Publisher
 	} else {
 		// Decode the JSON
 		dec := json.NewDecoder(strings.NewReader(publisherFromString))
-		err := dec.Decode(&publisherToInsert)
+		err := dec.Decode(&datPublisher)
 
 		if err != nil {
 			return c.JSON(http.StatusInternalServerError, models.Message{"Error decoding publisher: " + err.Error()})
 		}
 	}
 
-	// Insert the publisher
-	newPublisher, err := models.AddOrUpdatePublisher(publisherToInsert)
+
+	// Check if we have an ID other than the one in the struct
+	id := c.Param("id")
+	if id != "" {
+		// Make int
+		publisherID, err := strconv.ParseInt(id, 10, 64)
+
+		if err != nil {
+			return c.JSON(http.StatusInternalServerError, models.Message{"Could not get book id"})
+		}
+		datPublisher.ID = publisherID
+	}
+
+	// Insert or update the publisher
+	newPublisher, err := models.AddOrUpdatePublisher(datPublisher)
 
 	if err != nil {
 		return c.JSON(http.StatusInternalServerError, models.Message{"Error"})