Yes, putting something else in the place of God is idolatry, but the bible IS the inspired word of God. The Lord is very clear about how highly he regards his word.

It is the Spirit who gives life; the flesh profits nothing. The words that I speak to you are spirit, and they are life. John 6:63

I will worship toward thy holy temple, and praise thy name for thy lovingkindness and for thy truth: for thou hast magnified thy word above all thy name. Psalm 138:2

Heaven and earth shall pass away: but my words shall not pass away. Mark 13:31

It is very important to have a real relationship with God, and we should be spending adequate time in worship and in prayer. We should not, however, throw away our bibles. We should be reading his word, but also doing his word.

Be doers of the word, and not hearers only. Otherwise, you are deceiving yourselves. James 1:22

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Remember the scribes and the pharisees, they would walk around with magnificent robes and a phylactery on their head containing verses from scripture. Although they carried scripture with them everywhere they went, they were not seeking a relationship with God, but to be seen and revered by men for their supposed "holiness".

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“Woe to you, scribes and Pharisees, hypocrites! For you are like whitewashed tombs, which outwardly appear beautiful, but within are full of dead people’s bones and all uncleanness. Matthew 23:27