Succinctly Excellent Free Technical E-Books

There are a lot of free ebooks covering technical subjects, and there are a lot of ebooks that have excellent content however finding some with both attributes can be hard. Syncfusion have a collection of really good technical overview books that cover different subjects ‘succinctly’.

https://www.syncfusion.com/resources/techportal/ebooks

These are not 1000 page monsters but instead focus on providing enough to get you up and running without the fluff. They are free to download and very easy to read. I particulary recommend the JavaScript, HTTP and CSS ones. Oh and I nearly forgot to mention that they come in both PDF and Kindle formats.