This bundle contains all five books in the Carstairs series and the free short story Best Sinterklaas Ever, which isn’t really part of the series but a prequel. So six eBooks in all, in PDF and ePub format. Sweet!

You save $7.95 on individual purchases with this bundle. If you also want my other books, there is a bundle called The Full Dudderie 2017 where you save a bit more.
The Carstairs Quartet bundle is no longer available, but if you purchased it you can still retrieve those files.