Qur'an:8:7 "Allah wishend to confirm the truth by His words: 'Wipe the infidels out to the last.'"
Qur'an:8:12 "Your Lord inspired the angels with the message: 'I am with you. Give firmness to the Believers. I will terrorize the unbelievers. Therefore smite them on their necks and every joint and incapacitate them. Strike off their heads and cut off each of their fingers and toes.'"
Qur'an:8:15 "Believers, when you meet unbelieving infidels in battle while you are marching for war, never turn your backs to them. If any turns his back on such a day, unless it be in a stratagem of war, a maneuver to rally his side, he draws on himself the wrath of Allah, and his abode is Hell, an evil refuge!"
Qur'an:8:39 "So, fight them till all opposition ends and the only religion is Islam."
"Believers, do not make friends with any but your own people...They desire nothing but your ruin....You believe in the entire Book...When they meet you they say: 'We, too, are believers.' But when alone, they bite their finger-tips with rage." (Surah 3:118, 119)
"Seek out your enemies relentlessly." (Surah 4:103-)
"If you should die or be slain in the cause of God, His forgiveness and His mercy would surely be better than all the riches..." (Surah 3:156-)
I think you get the point.
You can't say the Quran is a book of peace when it explicitly says kill all non believers of islam, or to kill everyone untill Islam is the only religion.