Many authors have written themselves into corners by having to stick to the series rules they thought up early and didn't take into consideration how they'd work in later books. (jamigold.com)
You can also read some excerpts of later books from the series. (ximerion.com)
Once you create an audiobook, the process will become much faster and easier for later books so don't let the time keep you from taking advantage of this great income source. (myworkfromhomemoney.com)