”书“ is kind of more official, like a novel, a textbook or dectionary. ”本子“ is a casual word and more likely to be understood as "brochure".

书means book， 本子 means notebook or brochure ＝＝＝＝＝＝＝＝ textbook is 课本 dictionary is 字典

书=book 本子=notebook

书：book (上面有很多文字给你读。） 本子:note book.（你可以用来做作业。或者记录一些事情。You could use it to do your homework. you can write word on it or painting.）

书 يعنی کتاب 本子 يعنی دفترچه راستی واحد 书 هم می گويم 本 مثل 一本书