go run main.go handlers.go 

http://localhost:8080/service/books

 curl -v -X GET http://localhost:8080/service/books
    Note: Unnecessary use of -X or --request, GET is already inferred.
    *   Trying ::1...
    * TCP_NODELAY set
    * Connected to localhost (::1) port 8080 (#0)
    > GET /service/books HTTP/1.1
    > Host: localhost:8080
    > User-Agent: curl/7.64.1
    > Accept: */*
    > 
    < HTTP/1.1 200 OK
    < Date: Wed, 25 Nov 2020 12:04:36 GMT
    < Content-Length: 102
    < Content-Type: text/plain; charset=utf-8
    < 
    Here is your list of books: 
                    1. Bunney and Rabbit
                    2. Lost in the Jungle
    * Connection #0 to host localhost left intact
                    3. Storms* Closing connection 0

go test