Tom Tackles the Chalet School by Elinor M Brent-Dyer

Book 22 in the Chalet School series
Published September 2017. Complete and unabridged.

The Lost Staircase by Elinor M Brent-Dyer

Published 2018. Complete and unabridged

The Chalet School in Guernsey by Katherine Bruce

Brand New Chalet School Fill-in title. Published in November 2020.