The Hidden Base by A.E. Warren

She wants to escape the past. Is she doomed to repeat it In the spectacular sequel to Subject TwentyOne Elise and her friends have unearthed the truth that has been kept from them their whole lives and escaped the Museum of Evolution but at what cost After a perilous escape Elise and her companions have made it to the safety of the secret fifth base Uracil but her family is still in danger. Desperate to secure them passage and a safe place to live she makes a deal with the leaders of Uracil Paperback softback