Most of the modern texts are commentaries on the classical texts. And here Thrangu Rinpoche is most prolific. But if you want to study mahamudra, you're far better off getting instructions in person from a teacher, though I wouldn't discourage reading texts as well.
Having obtained the supreme freedoms
and conjunctions of the precious human existence,
endowed with faith, energy, and intelligence,
Having attended on a worthy spiritual friend
and received the pith of the holy instructions,
May we practice these properly, just as we have received them,
without obstacle or interruption.
In all our lives, may we practice and enjoy the holy dharma.