This book introduces the nondual way of meditation, which is quite different from the popular mindfulness meditation method. With mindfulness meditation, it takes years of daily practices to be awakening. The promise of effortless meditation is that through some powerful glimpses, the practitioner can experience awake awareness right away. These practices are usually quite short (most are just several minutes) but the effects are often immediate.
There are over 40 glimpses in this whole book, some are quite similar to others. One problem that I experienced while going through these glimpses is that many of them are question-based. Rather than guiding the practitioner with concrete instructions, the author tends to ask a lot of questions in these glimpses. And often the answers are not obvious, especially as a new practitioner. As a result, by the end of a glimpse, I'm not sure if I "got it". Another problem is that the author likes to use a lot of adjectives to describe awareness, which sometimes can be annoying. I've never seen this style of teaching instructions in other kinds of meditations. Loch Kelly's teaching style was also complained about by other practitioners such as those on the Waking Up app. Indeed, if you are totally new to effortless meditation and listen to his meditation lessons directly, you may not understand what he's talking about. It gets better after reading his book.
I personally tend to use these glimpses to quickly shift out of trance states, where my mind is in such involved fashion that I cannot see the whole picture. I'd record the instructions using my own voice and play it during meditation. It reminds me that the "I" part of the monologues is just a mini version of the Self. The underlying awake awareness is vast, all encompassing, always there and with love all the time.
I'd like to think of the effortless meditation methods as a companion rather than an alternative to the shamatha practice. The glimpses can be used anytime and anywhere to efficiently help me restore balance. I highly recommend giving them a try.