Google Books Library XML Output to CSV

# Output Google Books Library XML Files to CSV
# For creating labels for new library books
# $UID is the primary key for the library system, make sure you select a free range
# the script auto increments $UID from the selected starting point for each book

[xml]$books = Get-Content D:\AR_Middle_years.xml

 $UID = 9000

 $bookObj = $books.library.books.book | ForEach-Object {
      New-Object PSCustomObject -Property @{
        "ISBN" = $_.identifier.value
        "Title" = $_.title
        "Author" = $_.contributor
        "ID" = $UID++
      }
 }

 $bookObj | Select Title, Author, ISBN, ID | Export-Csv -NoTypeInformation -Path D:\Books.csv