Apex domains cannot have CNAME records.
Question and response
Question
dig nicolecooperbooks.com. NS
Answer
nicolecooperbooks.com. 5 NS ns1.nicolecooperbooks.com.
nicolecooperbooks.com. 5 NS ns2.nicolecooperbooks.com.
Authority
The response has no authority records.
Additional
ns1.nicolecooperbooks.com. 5 A 192.95.30.213
ns2.nicolecooperbooks.com. 5 A 51.79.42.41
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0