You can't find FREE secure vpn, because public can't be secure.
You can make your anonymity highter, if you'll use TOR in chain with VPN.
And for sure, better solution is your own VPN or RDP server.
My bit to this:
collection of hacking books:
https://drive.google.com/folderview?id=0B7AgwewyXBZDX0I1V3cyTC0tVlU&usp=drive_web
https://drive.google.com/folderview?id=0B7jWflk4TmF3WEhqQVFmMHN3Q2s&usp=drive_web
Books for Kali linux: Basic Security Testing with Kali Linux Mastering Kali Linux for Advanced Penetration Testing Web Penetration Testing with Kali Linux Kali Linux: Wireless Penetration Testing Beginner's Guide Intermediate Security Testing with Kali Linux Hacking with Kali: Practical Penetration Testing Techniques Kali Linux: Assuring Security By Penetration Testing Kali Linux Network Scanning Cookbook