The majority of the dolphins of Pern runs concurrently with the events of 'All the Weyrs of Pern'. The dolphins of Pern is a wonderful book for dragon and dolphin lovers alike. You might be tempted to think that because the Pern series was 'supposed' to end with All the Weyrs of Pern, this book wouldn't be as good as those before it. I assure you this is not the case. However, this book should not be read before 'All the weyrs of Pern'. I would recommend reading Dragonsdawn, Dragonflight, Dragonquest, The white dragon, All the Weyrs of Pern then The Dolphins of Pern.