Ask HN: Security for Saas Startups

[clockwork_189]

I have been looking around for tutorials or advice on securing our web app, but unfortunately there doesnt seem to be any good resources that I could find. Is there any good book on security for startups or rather just security for web applications?

[clockwork_189]

This post by evernote CTO was very helpful, but I am look for something more instructional(http://firstround.com/article/Evernotes-CTO-on-Your-Biggest-...).