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 ### Assembly Language
 
 * [An introduction to reverse engineering for beginners](https://github.com/dennis714/RE-for-beginners)
-* [Assembly Language Succinctly](https://www.syncfusion.com/Account/Logon?ReturnUrl=/resources/techportal/ebooks/assemblylanguage) (PDF)
+* [Assembly Language Succinctly](https://www.syncfusion.com/resources/techportal/details/ebooks/assemblylanguage) (PDF)
 * [PC Assembly Language](http://drpaulcarter.com/pcasm/) - P. A. Carter
 * [Professional Assembly Language](http://blog.hit.edu.cn/jsx/upload/AT%EF%BC%86TAssemblyLanguage.pdf) (PDF)
 * [Programming from the Ground Up](http://mirror.unicorncloud.org/savannah-nongnu//pgubook/ProgrammingGroundUp-1-0-booksize.pdf) (PDF)