I don't need to demonstrate that the Bible is not a whole.
True, you don't need to do anything but die (and pay taxes). But if you challenge the claim that "the Bible is a whole,"
then you must show why your assertion, that it is not a whole, is true.
In the absence of that, your assertion is groundless.
It is a collection of disparate writings that have little inherent relationship with one another. The writings in the Bible are published together just for ease and cost.
Well, for starters,
the Bible as a whole
shows (is a type, symbol, picture of) who Jesus is. That's
why the following are found in its individual books.
In Genesis-------------Jesus is the promised seed of the woman (Lk 1:34; Ro 16:20)
In Exodus--------------Jesus is the Passover Lamb, the Lawgiver, the Intercessor (1 Co 5:7; Mt 5:23-47; Heb 7:5)
In Leviticus-----------Jesus is the High Priest, the atoning sacrifice (Heb 7:23-28)
In Numbers------------Jesus is the smitten rock, the cloud, the pillar of fire (1 Co 10:1-4)
In Deuteronomy------Jesus is the prophet like Moses who is to come (Lk 7:19-20)
In Joshua--------------Jesus is the Captain of our Salvation (Heb 2:10)
In Judges--------------Jesus is the Judge, Lawgiver, deliverer (Jn 5:22; Mt 12:7-8; 2 Co 1:10; 1 Th 1:10)
In Ruth-----------------Jesus is the kinsman redeemer (Lk 1:68-69, 16:17, 24:21; Gal 4:4-5; Jn 3:16-18)
In Samuel--------------Jesus is the trusted prophet (Mt 12:41-42, 21:11, 46; Lk 1:76, 7:16; Jn 7:40)
In Kings----------------Jesus is the reigning king (1 Co 15:25)
In Ezra-----------------Jesus is the faithful scribe (Lk 16:17; Mt 5:18, 24:35)
In Nehemiah----------Jesus is the restorer, the builder of the broken wall (Ro 8:19-22; 2Co 5:17)
In Esther---------------Jesus is the advocate (Ro 8:24, Heb 7:25)
In Job------------------Jesus is the suffering righteous one (Ac 3:14, 7:52)
In Psalms---------------Jesus is the Lord, our Shepherd (Jn 10:14)
In Proverbs------------Jesus is the true wisdom of God (1 Co 1:24)
In Ecclesiastes--------Jesus is the meaningful goal (Mt 16:24-26)
In Song of Songs------Jesus is the lover and bridegroom (Jn 3:28-29; Rev 19:7-9)
In Isaiah----------------Jesus is the Prince of Peace (Lk 1:79; Ac 10:36; Ro 5:1; Eph 2:13-16; 2 Th 3:16; Heb 7:3, 11, 17)
In Jeremiah-----------Jesus is the weeping prophet (Lk 19:41-44)
In Ezekiel--------------Jesus is the wonderful four-faced man (Rev 4:6-8)
In Daniel---------------Jesus is fourth man in the fiery furnace
In Hosea---------------Jesus is eternal husband married to backslider (1 Co 1:1-3, 5:1-2, 11:17-22)
In Joel-----------------Jesus is the baptizer with the Holy Spirit (Mt 3:11)
In Amos----------------Jesus is the burden bearer (1 Pe 2:24)
In Obadiah------------Jesus is the Savior (Mt 1:21, Lk 2:11, Jn 3:17)
In Jonah---------------Jesus is the missionary (Mt 4:17, 23-25)
In Micah---------------Jesus is the messenger with beautiful feet (Ro 10:15)
In Nahum--------------Jesus is the avenger (Jn 5:22, 8:26, 12:31)
In Habakkuk-----------Jesus is the evangelist pleading for revival (Mt 23:37)
In Zephaniah----------Jesus is the Lord Mighty to Save (Heb 7:25)
In Haggai--------------Jesus is the restorer of the lost heritage (Jn 3:16, 18, 36)
In Zechariah----------Jesus is the fountain opened in the house of David for cleansing of sin (Heb 9:14)
Malachi----------------Jesus is the Son of Righteousness rising with healing in his wings (1 Jn 1:7)
These are some of the very tight links among the books of the OT and the NT,
establishing that the Bible is, indeed, a whole.