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src/App.js

@@ -24,8 +24,6 @@ class BooksApp extends React.Component {
   onSelectChange = (e) => {
     const id = e.target.name
     const newShelf = e.target.value
-//    console.log(id, newShelf)
-    let changeShelf = this.state.books.filter((book) => { return book.id === id})
     const books = this.state.books.slice(); // Create local copy to change.
     books.forEach((book) => {
       if (book.id === id) {

src/Bookshelf.js

@@ -92,7 +92,7 @@ class Bookshelf extends Component {
                         <div className="book-top">
                           <div className="book-cover" style={{ width: 128, height: 193, backgroundImage: `url("${ book.imageLinks.thumbnail }")` }}></div>
                           <div className="book-shelf-changer">
-                            <select name={book.id} onChange={this.onSelect}>
+                            <select name={book.id} onChange={onSelect}>
                               <option value="none" disabled>Move to...</option>
                               <option value="currentlyReading">Currently Reading</option>
                               <option value="wantToRead">Want to Read</option>