function addBook() {

var titleInput = document.getElementById('title');

var authorInput = document.getElementById('author');

var title = titleInput.value;

var author = authorInput.value;

if (title && author) {

var bookList = document.getElementById('book-list');

var li = document.createElement('li');

li.innerHTML = `

<span>${title} by ${author}</span>

<button class="delete-btn" onclick="removeBook(this)">Delete</button>

`;

bookList.appendChild(li);

titleInput.value = '';

authorInput.value = '';

}

}

function removeBook(button) {

var li = button.parentElement;

li.remove();

}