Because the intellectual development cannot be disassociated with spiritual development, the Bible excels as a really worthy literature, indeed. So, the Bible is my choice as the literature that shapped my development the most.
The wisdom should be the ultimate goal of any person. Please, consider wisdom from now on as the concept of knowledge and good spiritual development.
So a wise person have their knowledges governed by good spirit.
But the contrary is true, too. The bad spirit really gives bad destinations to knowlege. And we can easily see it in disputes for belic and political power, for example. The atomic bomb is just another example.
Is there a midle term? Like, not so good and not so bad? Knowledge will never be neutral because the spirit will never be neutral.
The Bible just exposes these kinds of reflections, with good examples about positive and negative intelectual and spiritual attitudes.
The Bible proposes that intellectual and spiritual development can be improved and oriented to good things, to good attitudes and it shows how to achieve these kinds of improvements.
So, it was easy (for me) to choose the Bible as my preferred book(s) because it has the potential to improve intellectual and spiritual development of people. It's still relevant to this today.