One day, Isaac Thompson is just your average fifth grader playing the part of a porcupine in the school play. The next, he has strayed into a mysterious subterranean realm that has been lurking beneath his school — Castle Elementary — and launches his quest to knighthood. When Isaac's little sister Lily goes missing from their school's creepy basement, he and his best friends Max and Emma set out in search of her. Their search takes them to the Underground, where they encounter an army of spear-wielding rats, a talking human-sized bat, and a thumb-nosed prison guard. But humans who stay in the Underground too long transform into weird, unpleasant creatures and are forced to work for the horrible Elf King. Can Isaac and his crew escape the Underground before it's too late for them to ever return home?
REVIEW BY: Arianna, age 12 years, 10 months
MAY CONTAIN SPOILER:
This is a really good and super funny book!
My favorite part is when the rats keep shouting "HAA!" because it makes me laugh so hard I fell out of my chair!
My favorite character is "Fred the Acro-Bat" because he is really awesome and sweet, not to mention his cool secret that you find out at the end!
I recommend this book for any reader who enjoys an amazing adventure full of laughter!
I give this book 4 out of 5 stars and recommend it for ages 9 and up.