Hi @Vince
You may read about Ven. Waharaka Abhayarathana Thero’s Biography in Brief by clicking the link.
There is also an article on My expereinces with Ven Waharaka Thero from nirvanadhamma.com.
There are no English Dhamma book (beside Pure Dhamma Essays in Book Format) but only Sinhala Audio CD by Ven. Waharaka Abhayarathana Thero.
With metta, Seng Kiat