function makeReader() {
	let books = [];
	let i = 0;
 
	while (i < 10) {
		const bookReader = function() {
			console.log(i)
		}
		i++
		books.push(bookReader)
	}
	return books
}
 
let reader = makeReader()
 
reader[0]() // 
reader[5]() //