In the book you can see
references to another book.
They are the bridges of Time.
At the beginning,
you think that they have
only one direction
but after a deep learning
you understand
that they aren’t branches of a tree
but edges of a graph
and even a network
which belongs to Mankind and Time.
In the context
of the new cycle,
they are parts of the hyperstructure
which has as elements
singularities.
The references of the book are
at the same time
the foundations of the other one.
And we can say
that they are linked.
So the book is also
a hyperlink.