(We didn't actually read this series for school, but as a little enjoyable evening reading.)
My Minecraft-obsessed 6-year-old and I have now read everything "Minecraft" themed on the market, I think, and while most of the literary tie-ins to the game are insipid and tedious to read, this series was actually a lot of fun for both of us.
Designed in journal fashion, complete with ruled pages and a typeface that looks like hand printing, these diaries detail Gerald's many 30-day plans to accomplish some goal (usually impeded several times by bullies at school or his evil twin sister.) The majority of the conflicts are related to middle school, but even my little guy could appreciate Gerald wanting to be the "cool kid" at school and finding his "coolness" offset by his own anxieties and his complex relationships with his parents and other school kids.
What's cool about the books is that while the characters and situations come out of Minecraft, the stories are straight out of any middle school kid's life. There are no crazy battles with enchanted swords. Just kids having the kinds of troubles kids have -- and eventually figuring out the right ways to solve their problems. The books don't preach. They're written well. The characters are believable and interesting. Don't let all the "media tie-in" hype fool you. These books are simply good childrens' literature disguised as Minecraft fiction.
BTW: "Creeper" is a Minecraft character, not any kind of weird stalker -- I'm adding this to the review because Grandma started to read these with us and was confused.