Samsung Galaxy Nexus is the first official phone running the latest version of Android 4.0 Ice Cream Sandwich, alternately called the Google Nexus 3, Google Nexus 4G or Samsung I9250. If you have bought Galaxy Nexus you will probably need a manual user guide for Galaxy Nexus and Android 4.0 ICS functions.
Fortunately, Google has released the Galaxy Nexus Manual User Guide as a PDF, which is detailed with 107 pages explaining various tips and tricks to help you easily setup your phone, understand all the functions, settings and other new features in Android 4.0 ICS. Certainly, this manual user guide is a must have specially for the new and non-techie Android users.
Download Samsung Galaxy Nexus Android 4.0 Icecream Sandwich Manual / User Guide: Link. You can also check out the Galaxy Nexus online help guide here.
To get a quick start for hardware, download this guide from Samsung.