thankyou autumnstars, big_load and nighthiker for the recommendations

Luckily, I was able to find most of them as used books on ebay

can't wait to get started on reading.
Hi Patrick L, if I find answers to your thoughts, I will post them. For now, I have watched the educational series on sonoran preserve website and they gave me a good start about the general landscape/marcus landslide..etc
