Books on Tibetan meditation process (Vajra tradition or school of practice).
includes a systematic process for the use of inspired techniques.

All Tibetan traditions and schools are unique in that they always start to teach a “bibliography”.
The bibliography is a way of giving honour or credit or recognition or gratitude to the teachers within their lineage of traditions and practices.
They mention their Guru (Lama), their Guru’s Guru (Lama of their Lama), their Guru’s Guru’s Guru (Lama of their Lama’s Lama) and so on exhaustively…along with any new practices that evolved during each Lama.
All Tibetan lineages of traditional practices, trace their origin all the way back to Kashmir and acknowledge Shiva’s techniques as the origin.

Many people are unable to read past the first chapter simply because the “bibliography” is full of obscure names.
To the Tibetan, these names (characters and events and achievements) are familiar within their tradition and social fabric.

The Vajra tradition is more “shortcut” and less systematic than the Mahamudra tradition.
Of course, not everyone is able to achieve it.
Often self-deception can occur since very few people are able to objectively evaluate themselves.
It is even more important to have a Guru or Guide in this technique, simply to avoid pitfalls in evaluating one’s own progress.