[pgt]

You just made me realize that it would be cheaper for an advanced civilization to send a message light years away by altering the medium through which the signal passes than to control the source directly, e.g. a neutron star.

[aaaxyz]

The Three Body Problem trilogy by Liu Cixin might interest you

[throw1234651234]

That book is garbage and the author doesn't understand science, let alone writing. Just heads up for all the recommendations spammed on here.

Though his creative interpretation of higher dimensions was interesting (sending the tiny probe that unfolds on earth).