This series is awful. Listed on CBD for ages 5-10, and on Amazon as 4 and up, this designation is completely off, even arbitrary. I would recommend these books, maybe, for preschool. For some reason, they decided to use rhyming verse, a literary style that greatly appeals to the preschool set. But in that format, the serious topics of missions, paganism, and the confrontation between light and darkness are addressed. 
 This is everything I hate about cheery "christian" literature. A sing-song, happy-happy-clap-clap approach to the very real war of the ages is infuriatingly inappropriate in preparing our children to stand for the LORD. If this kind of God will never let anything uncomfortable happen to you sweet child theology is what you are looking for, Meloche's work will suit you fine. But if you are looking to raise up godly children who are equipped to know, love and serve the amazing, awesome, Creative God, do yourself a favor: Don't buy any books in this series. 
 Excellent alternatives, which I have reviewed on Goodreads are: 
 Christian Biographies for Young Readers (Series), Simonetta Carr 
 https://www.goodreads.com/series/8395... 
 Trial & Tribulation (A single book overview of Church History), Hannula 
 https://www.goodreads.com/review/show... 
 History Lives Series by Brandon & Mindy Withrow 
 https://www.goodreads.com/review/show...