I love Shiva Sutras and have different books related to Shiva Sutras, including Vijnanabhairava or Divine Consciousness, even a set of videos by Nityananda (I like to call him "young Nityananda" to differentiate from the more famous one who has left the body). Each sutra is only a line or two long and it contains a technique one can apply to ultimately experience Self-realization. There are all together 112 sutras - as it is said - all paths lead to God or God-realization - each of these 112 sutras is a technique that may be suitable to a particular individual at a particular point in time. Some people may feel comfortable observing the breath, some may feel more comfortable "loving God with all their hearts, minds, bodies and souls" - regardless of the form they give to the ultimate, or whether they are ready to let go of any forms and contemplate that which is formless, some may be musically oriented and may use music and pauses between sounds to dive into the experience of the Self, and so on. When you use a technique that is appropriate for you, you are bound to experience some noticeable changes within a few short time, often instantly. When you are using a technique which you've been practicing for months or years and nothing is happening, then perhaps that is not the best method for you.
In this Book of Secrets, Osho gives interpretation of each of the sutras through many interesting stories and metaphors. The sutras in themselves are priceless for the spiritual aspirant and I consider, and the interpretations in this book help to bring them closer home. You can meditate upon the sutra, you can apply it, and if your mind is full of preconceived ideas you may or may not appreciate some of the interpretations - and you don't have to accept or reject them, but simply take them as a starting point to trigger the knowledge that already resides deep within you. Ultimately, the true knowledge is not accessed by reading any books, but by diving deep within yourself - however books may help to inspire you and stir you in the right direction.