Below you'll find a R.A. Penfold books list, including published and even unpublished works. This R.A. Penfold bibliography includes all books by R.A. Penfold, including collections, editorial contributions, and more. Any type of book or journal citing R.A. Penfold as a writer should appear on this list. The full bibliography of the author R.A. Penfold below includes book jacket images whenever possible. This poll features Micro Interfacing Circuits Book 1&2 An Introduction to PIC Microcontrollers and more.