Vijnana Bhairav is a very ancient Tantric book on the secret science of Universal Consciousness. It has simple mediation techniques on how an individual can connect to Universal Consciousness.
The techniques are presented as a dialogue between Shiva(Mahadev) and Shakti(Parvati) were she desire to know various mediation techniques to tap into this Universal Consciousness. Shiva then mention 112 simple techniques to connect to this Universal Consciousness.
The mediation techniques helps us realize or unveil our inherent nature by removing the dirt due to Ignorance, Attachment and our Karmas.";