After you get past the beginning techno stuff, you will have trouble putting down this book.
Dragonsdawn is about the colonists who came to Pern. They settle in at Landing and start building houses for families and Crafthalls to set up apprentinceship.
Soon young Sorka and Sean find miniature dragons who come to be called firelizards. Their friendship blossoms soon after they get firelizards of their own.
Unexpected danger comes all too soon in the form of mindless silver worms that fall from the sky to eat anything organic in it's path. Thread!
Only fire, water or stone will stop the Thread, but the sleds that the colonists brought with them weren't for often use and soon they weren't adequate to protect the people, but there is one hope. Those little firelizards that Sorka and Sean found can teleport themselves and breathe fire. They protect things from the Thread.
If only they were big enough to hold a rider. Kitti Ping genetically engeneers dragons and her granddaughter tries to keep on where Kitti left of, but fails with breeding a watchwher, a dragonlike animal who is sensitive to the light and is very protective of those it knows.
Soon, the volcano near Landing erupts and everyone is driven out to live elsewhere and leave a lot of technology behind.
This book is the basis for some of the themes in other later books such as The White Dragon and All The Weyrs of Pern.