Alcatraz Versus the Evil Librarians by Brandon Sanderson

From chapters.ca:
A hero with an incredible talent - for breaking things. A life or death mission - to rescue a bag of sand. A fearsome threat from the powerful secret network that rules the world - the evil librarians. Alcatraz Smedry doesn't seem destined for anything but disaster. But on his thirteenth birthday, he receives a bag of sand, and his life takes a bizarre turn. This is no ordinary bag of sand - and it is quickly stolen by the cult of evil Librarians who are taking over the world by spreading misinformation and suppressing the truth. The sand will give the evil Librarians the edge they need to achieve world domination. Alcatraz must stop them all - by infiltrating the local library, armed with nothing but eyeglasses and a talent for klutziness.