The following Amazon list may be of service: http://amzn.to/2v0TKgD and http://amzn.to/2hpqr47
And finally, the recently published volume by Drikung Kagyu lama John T. Houseman includes full instruction in gTummo and Clear Light yogas, including their practice with KarmaMudra and MahaMudra…
The First Complete Practice Manual in English of Indian Vajrayana, ca 800 CE (including and emphasizing KarmaMudra)
