A couple of things before you start.
First, the technology. This novel was written in 1995 when cellular phones were the exception rather than the rule. People on the street still called from public booths and kiosks. Also, the GPS device used by Snake was state of the art then. No Magellans, no Garmins, no GPS apps for your smartphone. In 1995 it took a special plug-in device plus a PC to make use of GPS technology.
But the novel is not about technology. The issues it addresses – the so-called War on Drugs and all the misery and corruption it causes – are as real as ever. People are coming around (as of this writing, Colorado and Washington have legalized marijuana) but we’ve still got a long way to go before we stop filling our jails with fellow Americans whose only crime was wanting to get high.