There are many reference books about conducting, some of them still being read despite dating from the early 20th century but your dream is just a dream. Conducting is as much apprenticeship as theory. And as many here have remarked, conducting schools and styles abound. You have to make a choice or let life make the choice for you.
In the original version of your question you warned:
Please don't include books on peripheral subjects. For example "read this book about rhythm because you need to know rhythm to conduct" is bad. This question is about books specific to conducting.
That's twice a pity. First because what you assume to be peripheral, most good conducting books I could recommend would tell you to spend as much time as possible on them:
Understanding harmony and orchestration from a composer's point of view
Understanding the subtlety of the rythmic and dynamic hierarchy of instruments
Always go deeper in your analysis of the music notation.
Go on practicing chamber music as much as possible (you are probably doing it)
Go to concert as much as possible. Try to be allowed backstage.
Second, because one of the best book I could recommend to every budding conductor is on what you might term "a peripheral subject" and was published just six months ago (you won't need an archeologist) and I am fortunate to know one musician who was consulted for its content:
To build a progressive repertoire for a chamber music orchestra, you might be interested by this book from a violinist and conductor, starting at the beginning
In general their orchestra conducting books are recent, innovative and not too expensive and cover from beginner to intermediate, both from a conducting point of view and from an orchestra member point of view.
Same publisher than Elaine Gould, for a conductor with already some field experience, wanting to try himself of some of the greatest works of the repertoire, I find this book very inspirational:
to be read while listening to some of his recordings and some by other conductors with a very different style like L. Bernstein.
This is the kind of book that you would better loan from a library than buy yourself.