Forbidden knowledge -Magic was once seen a a forbidden knowledge
In image alone -It has a spellbook on it.
Chains are false warning -This line always caused me trouble
For concepts unknown -Magic is not a well known craft
Scribed in the dark -Spellbooks were written in the Dark Ages
And valued in the middle -They were still valued in the Middle
Now dangle in the modern -Most people do not believe in spells today, thus dangling between belief and disbilief
Can you solve my riddle? Spellbinder

SPELLBINDER?