comparing two field's values

hello guys

I have one field set up for my comments which is named "serial" , I have another field in my content type "book" which is again named "serial".
I want to ask commenters to enter the serial (then it must check the serial with the book's serial, if matched , he/she can comment)

let me illustrate the point:
my book's serial number is taxonomy term, I have some books added(node/1 , node/2 , node/3....)
when someone wants to comment on "node/3"
he/she fills the serial field in comment fields which has a machine name "field_comment_serial" and it must be matched with the field "serial" in "book" with a machine name "field_book_serial", which in this case we want the "serial" taxonomy term of "node/3".

is there any way to help with this?

thanks in advance