The Protestant canon has 66 books.
Protestantism affirms Sola Scriptura. The King James version of 1 Corinthians 4:6–7 says “6And these things, brethren, I have in a figure transferred to myself and to Apollos for your sakes; that ye might learn in us not to think of men above that which is written, that no one of you be puffed up for one against another. 7For who maketh thee to differ from another? and what hast thou that thou didst not receive? now if thou didst receive it, why dost thou glory, as if thou hadst not received it?”
Protestantism affirms Sola fide and Sola gratia. The King James version of Ephesians 2:8–9 says “8For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: 9Not of works, lest any man should boast.”
Protestantism affirms Solo Christo. The King James version of 1 Timothy 2:5 says “For there is one God, and one mediator between God and men, the man Christ Jesus;”
Protestantism affirms Soli Deo gloria. The King James version of 1 Corinthians 10:31 says “Whether therefore ye eat, or drink, or whatsoever ye do, do all to the glory of God.”
There is more that I know about Protestantism.