Listen, you don't need to read ALLL the Alchemy books. If for example you read a book in 10 hours, and meditate only one hour on it, what was the point ? But if you meditate 100 hours on it, then you can probably grasp something about the message delivered. I don't say it's the perfect method, but it's IMO more efficient than just reading and being a library on a pair of legs.
There is now a kind of prepared path or curriculum commonly accepted, largely vehiculed by "schools" of Alchemy. You do this, and this, and step 1, the 2 and 3... and there you go ! It's so reassuring to feel guided right ? You don't feel lost with that. Bad news, you're already lost by taking such a path.
I cannot agree more.
Where to dig then ? In the old stuff. Old of several centuries and in the ever new and fresh nature all around you.