Function can’t get Object from Class

I have a forEach method that has a function(displayBook) where it displays details of a book from an Array created from a Constructor class.

myLibrary.forEach(Book => {
    displayBook(Book)
})

function displayBook (item) {
    let div = document.createElement("div")
    let listName = document.createElement("li")
    let listPages = document.createElement("li")
    let listRead = document.createElement("li")
    let removeButton = document.createElement("button")
    
    document.body.appendChild(div)
    div.className = "bookCard"
    listName.textContent = item.name
    listPages.textContent = item.pages
    listRead.textContent = item.read
    div.appendChild(listName)
    div.appendChild(listPages)
    div.appendChild(listRead)

    div.appendChild(removeButton)
    removeButton.className = "removeButton"
    removeButton.textContent = "Remove Book"
}

I have another function(addBookToLibrary) that asks for new data and add it into the array. Then calls the function(displayBook) to display the new data. This function creates another div as written but it does not get thew item.name, item.pages, and item.read of the new data. It also says

Uncaught TypeError: item is undefined

function addBookToLibrary(item) {
        let bookName = prompt("Enter book name.")
        let pageNumber = prompt("Enter number of pages.")
        let readStatus = prompt("Have you read it?")
        const newBook = new Book(bookName, pageNumber, readStatus)
        myLibrary.push(newBook)
        displayBook(item)
    }