Collins, Suzanne. (2003). Gregor the Overlander. New York: Scholastic.

This story is a bout a young boy, Gregor, who lives in New York City. When his mother leaves for work, Gregor takes care of his younger sister, Boots, and his grandmother. One day, his sister falls through the grates in their apartment, so Gregor falls in after her. They end up falling far into the Underland where strange humans, bats, rats, mice, and fireflies live. There is turmoil between the strange humans' city, Regalia, and the rats. In the end, Gregor finds out a prophecy involving him forces him to help the city survive.
I read this book as a 5th grade student and fell in love with the adventure within the pages. I absolutely loved this book and series, and I would recommend it to students for sure!
I think this book would be a great recommendation for teachers to give students to fall in love with reading, especially boy students.
This book is also great to suggest to students because if they fall in love with the boo, like I did, there are more books within this series for the students to enjoy.
The following is a link to questions for this novel: http://www.lwsd.org/school/wilder/PTSA/Enrichment-Activities/Documents/Classic%20Books/Gregor%20The%20Overlander.pdf
The video below is a book trailer for this novel:

The following is a link to an $8 set for this novel: https://www.teacherspayteachers.com/Product/Gregor-The-Overlander-Novel-Study-with-Quizzes-Vocab-and-Questions-139718

Book Cover