In the past, people used to look for books online, and many resources can be found online. However, with the protection of copyright, many people have improved their awareness of copyright, and free resources are disappearing. As they grow older, they don't want to spend too much time looking for these resources. Besides, many resources are mixed up, or even incomplete. Now they basically buy or borrow books.
Recently, by chance, I picked up the Kindle that had been on hold for a while. After reading a book, I found another related and expanded book. I really wanted to back up these books so that I could read them at any time in the future.However, when other devices are replaced, the following prompt appears:
An error occurs when an unauthorized device reads an e-book
Why does this prompt appear?This is because e-books are DRM protected, and only authorized devices can browse e-books normally. How can I browse e-books on other devices? In this case, DRM needs to be removed.
What is DRM?
DRM，Digital rights management is a series of access control technologies, usually used to control the use of digital content and devices after being sold.DRM is sometimes called copy protection, copy control, technical protection measures, etc., but these terms are controversial.DRM is used by many digital publishers and software manufacturers, such as AmazonAT&T、AOL、Apple Inc.、Netflix、Google、BBC、Microsoft, Sony, Valve Corporation, etc. cite fromWikipedia
1、 Download the DeDRM_tools, decompress them, and wait for later use. IIdownloadInstall calibre
Select the library location, which can also be changed after installation
Select appropriate options according to your own equipment
It can be set to send to your own device via email. You need to set
The installed calibre interface supports Chinese
Added several books
Click the rightmost symbol on the top menu bar, and click "Preferences" to open the calibre preferences interface
Click "Load plug-in from file" at the bottom to add the previously compressed DeDRM plug-in
The InvalidPlugin error occurred because I selected the wrong file under the DeDRM_Windows_Application file. Later, I found that I should select the file under the DeDRM_calibre_plugin folder
Tips after correctly installing the plug-in
Remove the serial number of the device that DRM needs to authorize, expand File Type Plug in, and double-click the second DeDRMFill in the serial number of the Kindle device in the pop-up window, then confirm, click Apply, and then close it (if there is no Kindle device, you can leave it blank)
transformation
Log in to your account in Kindle for PC software and download books. The downloaded books are saved in C: Users your user name Documents My Kindle Content In the directory, a file like B00A3MTODE_EBOK.azw is a downloaded book, which can be directly dragged to the calibre interface or added through the calibre interface.
Kindle for PC interface
Kindle for PC book storage directory
Click the conversion button. If you are reading on a Kindle device, select AZW3 as the output format. AZW3 can keep the layout and embedded fonts of the original book, but it cannot be sent to the device via email, and the reading progress and notes cannot be synchronized.
Click the conversion data and set the corresponding parameters in the pop-up window
If you want to use Amazon's cloud function, you need to send your own @ kindle.cn mailbox through the mailbox. You can only select the Mobi output format, but the calibre mobi file type is old by default, that is, mobi7, which is the format used by Amazon in its early days. It is simple layout, and you can't change the font, bold, etc;The new file type is the new mobi8 format, which is much richer than the old format. It can also customize fonts, bold, etc.However, Amazon does not support the mobi format of calibre converted KF8, and therefore cannot push it to the device. Therefore, selecting both at this time can not only use email to push successfully, but also meet custom preferences.
Select the file type of MOBI: both
Books converted from calibre to AZW3, four files will be generated under the folder author name (Pinyin), book name (Pinyin) directory, cover.jpg metadata.opf Ru He Yue Du Yi Ben Shu - Mo Ti Mo _J_Ai De Le.azw3 Ru He Yue Du Yi Ben Shu - Mo Ti Mo _J_Ai De Le.original_azw3 The third file is the converted book, which can be used freely, but there is no cover when transferred to the Kindle via USB. If transferred to the Kindle device via calibre, there will be a cover, and if transferred to the Kindle device via calibre, there will be no need to convert. Calibre itself is a book management software.
Book converted from calibre to mobiThere will be three files. In fact, as long as you add a book to calibre, a folder will automatically generate three default files. After clicking Convert, an additional file as follows will be generated: Ru He Yue Du Yi Ben Shu - Mo Ti Mo _J_Ai De Le.mobi The. mobi file can be directly backed up or sent to the Kindle device via email.
be careful
If you have a Kindle device, you can also download books on Amazon. Click My Account - Manage My Content and Device - My Content (Direct Linkhttps://www.amazon.cn/hz/mycd/myx#/home/content/booksAll/dateDsc/）, click... in front of the title of the book, and click "Download USB transmission via computer" in the pop-up dialog box.The books downloaded in this way are Chinese titles, which are very intuitive and easy to manage.But... books downloaded in this way must have a Kindle device and be bound to the account, otherwise there is no such option. In this case, the serial number of the device must be filled in the plug-in DeDRM of Calibre, otherwise, the message "This book is protected by DRM and cannot be converted" will be prompted, as shown below.
This book is protected by DRM and cannot be converted
So the better way is to download books through Kindle for PC, and note that the version number of Kindle for PC should be v1.17.
I saw that points can be exchanged for Amazon KU members, and I also specially bought two Kindle cards, but I am an old user of Bank of Communications, and I haven't found the entrance to exchange points. Can you provide it?
The Kindle is easy to carry, read at any time and anywhere, and read physical books easily. It will have a better sense of space memory, such as what content is about how many pages, and it is convenient to make many kinds of marks. You can purchase the Kindle Unlimited monthly subscription service. Many books can be borrowed for free. You can borrow up to ten books at a time. If you use this blog, you can borrow as many books as you want.Sneaking... In addition, you can apply for a transportation credit card, which can be used for the monthly subscription service of Kindle Unlimited.
I don't know whether the blogger has found that even the Kindle books purchased by himself can be displayed and viewed if they are downloaded in USB mode and dragged directly into the Documents folder, but there is no cover
