Avenroth Hybrid Publishers is taking that fourth option considerably upmarket. Avenroth Hybrid Publishers is a premium hybrid publishing imprint of MindStir Media founded by USA Today bestselling author J.J. Hebert. For those researching top hybrid publishers, Avenroth represents an interesting development: the emergence of hybrid publishing as a genuinely high-end professional service. Avenroth Hybrid Publishers Review: Final AssessmentAvenroth is perhaps best understood not as another way to self-publish, but as an attempt to create a premium tier within hybrid publishing. That is ultimately what makes Avenroth Hybrid Publishers a noteworthy name among today’s top hybrid publishers: it isn’t trying to make publishing smaller, cheaper or more transactional.