Response:

It sounds like you are doing very well in your new meditation practice. The sense of the body feeling immovable while the mind is light and relaxed indicates that you are meditating correctly. The muscular pains in the arms and legs after you get in bed to sleep could be due to any number of things. It might be a continuation of the stress release process that started in meditation and is continuing afterward, or it might be something as simple as cramping induced from sitting for half an hour on the floor at midnight when your body is normally expecting to be asleep.

The main point about meditation  I would say to you is that meditation is a means to improve your daily life, mentally, physically and socially. That is why it is recommended to meditate in the morning after you wake up and before you start your day. And then meditate again in the afternoon in preparation for the evening activity. The activity of the day plays an essential role in stabilizing and strengthening the benefits of the deep rest we gain in meditation.  Rest and activity must work together in balance for maximum spiritual progress.

Both the books you listed will be good one’s for you to start with. As far as bookstores in Pakistan, I’m not sure if you are near a big city or not, but you can always find what you need on the Internet.

Love,

Deepak