Prepare a project with 17 Book, and each book has 13 sheet.

Active Book1, without highlighting any column, click Box chart toolbar button to open Plot Setup

Select “Worksheets in Folder“ to list all worksheets in current folder in top panel. Sort the sheets by Book.

Ctrl+A to select all sheets. Check col(A) as Y in middle panel. click Add button to add all columns into bottom panel.
->All columns are sorted by books and sheets, from book1 to book17

Click ok to create the box chart. Double-click bottom tick labels to open Axis dialog.

Set Display Type = Column Name or Label, Display = <Custom>, Custom Display = @WS: Sheet Display Name.

Go to Scale tab, set Major Ticks Increment = 5. Click OK.

Change the font size of tick labels to 10 and rotate it.
==>The tick labels at the end repeat back to Book1 or Book2, which should show Book16 or Book17.