After clicking on the book, the list of verses should be a parallel list of the OT and NT verse(s).
For example, after clicking on Mark, Isa 40:3 should be listed next to Mk 1:2-3.
A voice cries:
“In the wilderness prepare the way of the LORD;
make straight in the desert a highway for our God.
The Holy Bible: English Standard Version (Wheaton, IL: Crossway Bibles, 2016), Is 40:3.
As it is written in Isaiah the prophet,
“Behold, I send my messenger before your face,
who will prepare your way,
3 the voice of one crying in the wilderness:
‘Prepare the way of the Lord,
make his paths straight,’ ”
The Holy Bible: English Standard Version (Wheaton, IL: Crossway Bibles, 2016), Mk 1:2–3.