My Books Not Appearing In Kindle For Mac
You should check if the Book is compatible with your device. On the product page you will see something like ' Available for following devices' if this doesn't appear than the e-Book is compatible with all Kindle models. If the option is there you have to check if your device is listed otherwise it's incompatible. If your device is compatible but the book still doesn't download try following: - Hard Reset your device by holding the On/Off button 40 seconds or until you see a picture of a tree with a boy reading underneath it. Set your device in flight mode for 10-15 seconds after which turn flight mode off. Sever the wifi connection and sett it up again under settings. Tip on the button Cloud and try downloading the book manually.
Log off and back on your account under settings. Check under 'Manage your content and devices' ( settings if Whispersync is on or off. If nothing helps from here contact Amazon Client Service since you might have some issues with your wifi module.
I had the same issue (specifically I could download books, but the current book I was reading would not sync the page to my computer nor my phone from my kindle - the kindle would give an error as well), but the above steps actually did not work The steps were similar to these, which also did not work. But while I as logged into my settings area in Amazon I looked for the book in question and it said there was an 'update' to my book.
I updated and pushed the book to all three of my devices, no dice. So then I just removed the book from all devices, re-pushed to the three, and then it started working (sadly the page is now stuck at page 993 of 993 while only 56% complete with the book, but eh it syncs now) so if you can download on your devices, the version of the book may be different and you may need to redownload the book (granted for me I needed to remove it from all devices then re-download, so mark the location in the book!) hth.
First, check to see if your Kindle is WiFi enabled. If it is connected to the internet, your Whispersync is not turned on.


Tap on your menu tab, go to Settings, Device Options, Personalize Your Kindle, then Advanced options. If the Whispersync component in not enabled, tap on it and enable it. If your books are still not syncing, your Whispersync Device Synchronization is most likely disabled on your Amazon account. Sign into your account, click on Manage Your Content and Devices the click Settings. Under Device Synchronization, validate that Whispersync is enabled.

My Books Not Appearing In Kindle For Mac Download
I had tried several of the suggestions above and none worked. I could read my books on the Kindle Cloud, but when trying to sync with the Kindle app on my iPhone it would never sync - or vice versa. Rebooted phone, ensured whispersync was enabled on amazon site and on iphone, removed book from iphone and redownloaded, etc.
I did one other task that made this start working again for me. I went to the Amazon site under Manage Content and Devices and under the Devices tab I made my iPhone the 'Default Device' by clicking on the elipsis button next to my iphone. After doing this the sync started working right away as expected.