可以说："read books with my younger brother"。
来源：这是一句英语常用的日常用语。
英文例句：
I pke to read books with my younger brother on weekends.
We often spend our evenings reading books together.
My younger brother and I have a ritual of reading a chapter from a book before bedtime.
中文翻译：
我喜欢在周末和我弟弟一起看书。
我们经常在晚上一起看书。
我和我弟弟有在睡觉前一起读一章书的习惯。