Download or read book Mighty Merc written by Sheila Sweeny Higginson and published by . This book was released on 2018-09 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Miles's pet bionic ostrich, Merc, worries that his place in the Callisto family is threatened when the Tomorrowland Transit Authority asks the family to try out a new, more efficient robot named Axel.