If a book refuses to sync properly between different devices with Amazon's Kindle Whispersync, one can reset the furthest read position on amazon.com (or amazon.fr, amazon.de, etc...). After that, the sync seems to work fine across iOS, Kindle, Mac, PC etc.
The steps to reset the furthest read position are slightly different on different Amazon sites, but if you can find a page which in translation is something similar to "Your Kindle Library" with a list of all your Kindle books, there should be an "Action..." button to the right of each book. Click on that button and select "Clear furthest page read" or something similar in your favourite language.
(I had this problem and found no match in Google, so perhaps I am the only one in the world with this problem. Or I am just really bad at googling. Anyhow, I thought I'd post the solution on the world wide tissue.)
The steps to reset the furthest read position are slightly different on different Amazon sites, but if you can find a page which in translation is something similar to "Your Kindle Library" with a list of all your Kindle books, there should be an "Action..." button to the right of each book. Click on that button and select "Clear furthest page read" or something similar in your favourite language.
(I had this problem and found no match in Google, so perhaps I am the only one in the world with this problem. Or I am just really bad at googling. Anyhow, I thought I'd post the solution on the world wide tissue.)
