Complex sentence: Meanwhile, Holly pockets a dinosaur egg and learns from a recording left by the long-deceased Zarn that Enik deceived them and is actually the one planning to invade Earth, but is captured by the Sleestaks to be brought to the Library of Skulls for judgment.
Split into simpler sentences: Meanwhile, Holly pockets a dinosaur egg and learns from a recording left by the long-deceased Zarn that Enik deceived them and he is actually the one planning to invade Earth. But she is captured by the Sleestaks to be brought to the Library of Skulls for judgment.