This whole review is a "Spoiler" so don't read it. On the other hand, nothing interesting happens in the book anyway, so might as well save yourself the trouble of reading the actual book. 
 People of Pern: What's that in the sky! Is it a bird? Is it a Plane? Is it SUPERMAN? Ugh, no.. It's those goddamned Dragonmen, trying to filch our resources. 
 Dragon People We are Dragonmen! We will protect you from the evil threads! 
 Evil Threads: 
 People of Pern: Sod off, there's no such thing. 
 Lessa: Aha! The dragonmen are here! I will use them to regain my kingdom! Wait, where are you taking me! I don't want to be a dragonwoman! I want to rule my kingdom.... Actually, scratch that! On second thought, I want to be a dragonwoman. Oh I love my dragon, her eyes are so beautiful, I want to get lost in them 
 Dragon: 
 Lessa : I hate F'lar! I like F'lar! I hate F'lar! I'll have sex with F'lar! Only because his dragon chased mine and raped her. Dragon sex makes me feel so kinky! BUT I STILL HATE YOU F'LAR YOU SON OF A BITCH. 
 F'lar : I'm having sex with Lessa and she is the Weyrwoman, yet I will continue to call her "girl" because I'm from the stone age. 
 Time Travel is discovered. Hooray. 
 Evil Threads start falling. 
 People of Pern: Oh no! Dragonmen, Dragonmen! Save us! The Evil Threads Exist! 
 Evil Threads: 
 Dragons: 
 F'lar: Ahahah! I am so clever, I knew this would happen all along. Ahahaha! Now, if I could only get that "Girl" to love me. 
 Lessa : Let's time travel and bring more dragons! Hooray! I hate F'lar! I like F'lar! I'm going to have some more sex with him 
 End of Book 1