Correct

啃书本儿

/ kěn shūběnr / 
Strokes

Example

As a Verb

nibble at a book―read a book with great efforts in order to thoroughly grasp its contents

1
Bù
不
néng
能
sǐ
死
kěnshū
啃书
běnr  
本儿
  
,
yào
要
liánxì
联系
shíjì
实际
  
。

You can't read your books just for the sake of reading them; you should consider their practical use.