Hi, I created the series with the links you provided. After some investigation I found that there are more books in this series. I did this best I could with the books available on Goodreads, there are some books still missing from the series. I will work on trying to add them later because I have to find valid sources for data. <--- That's done, I added books 4, 6, and the omnibus [books 4, 5, and 6] to the database. A mix of The National library of Netherlands and Worldcat. I couldn't find the covers in any acceptable/valid source of covers https://help.goodreads.com/s/article/... if you find them in any of those sources please post. If you have the books you can scan/take a photo of the cover of your book [must match the isbn] and that can be used. Otherwise they will have to remain without a cover unfortunately.
That is not the official author's website, it says that is run by a fan and not affiliated with the author so unfortunately we cannot use it as a source for book covers https://www.felixthijssen.com/contact
Charlie Mann #2 - https://www.goodreads.com/book/show/3...
Charlie Mann #3 - https://www.goodreads.com/book/show/3...