Share 'in search of books on zine history...'

Hello everybody, I´m especially interested in zine history & am always looking for new info on the subject. So far I´ve read the basics: Stephen Duncombe´s Notes from Underground: Zines & the Politics of Alternative Culture V. Vale´s Zines! Volume I & Zines! Volume 2 (Re/Search Publications) R. Seth Friedman´s The Factsheet Five Zine Reader: The Best Writing from the Underground...