Consider the simpler sentence: "Reading makes you smarter." Add in the other words: "Reading books every day makes you smarter." and you have the correct form

Make is used with I,you,we, they and other plural subject. Makes is used with he,she,it and other third person singular noun/pronouns.

Makes. You can say about reading 'it makes you smarter' so makes is correct form.

Maxey is 100% correct