Books can if well written summarize a topic and get you started with the most useful bits first. By comparison, the internet can be a fire hose. You can have a peek before you buy if it is in the library. Find out what is new at blinkmonitor.com. Some books can have a long waiting list; that is a good sign that you might want to buy. I used to pay safari a few dollars monthly and had some great reads but stopped paying because I was not using it enough to justify. -- Sent from my Android phone with K-9 Mail. Please excuse my brevity.