MaxPowers

I have been hunting for a couple products, and I just can't seem to find them.
I have seen small ones, but need something that can hold large text books. I want something to hold my book while I lounge or sit at my desk so I can read or type while the book is pointed at me. Something with a full range arm. Seems easy.

Also, I am looking for a table/tray that I can pull up when I am sitting on the couch and use a full keyboard and mouse when I want to game while sitting on the couch. I have seen small trays like this for eating, but they are flimsy and very small.

If anyone knows where I can get these, that would be great!