I know that this is technically not Theravada Abhidhamma, however, I think that it is still valuable that this resource is available online in full and it will certainly complement one's understanding to read a text from a different Buddhist school. The introduction sections are particularly engrossing, and since the author is ultimately relying on the sutras (he was labeled a Sautrantika) there is really nothing here that is too alien to Theravada.
"The Abhidharmakośakārikā or Verses on the Treasury of Abhidharma is a key text on the Abhidharma written in Sanskrit verse by Vasubandhu in the 4th or 5th century. It summarizes the Sarvāstivādin tenets in eight chapters with a total of around 600 verses. The text was widely respected and used by schools of Buddhism in India, Tibet and East Asia.
Vasubandhu wrote a commentary to this work called the Abhidharmakośabhāsya. In it, he critiques the interpretations of the Sarvāstivādins, Vaibhāṣikas and others of the tenets he presented in his previous work from a Sautrāntika perspective."
Abhidharmakosabhasyam of Vasubandhu (4 vols), translated by Louis de la Vallee Poussin, English version by Leo Prudenhttp://lirs.ru/lib/kosa/Abhidharmakosab ... n,1991.pdfhttp://lirs.ru/lib/kosa/Abhidharmakosab ... n,1991.pdfhttp://lirs.ru/lib/kosa/Abhidharmakosab ... n,1991.pdfhttp://lirs.ru/lib/kosa/Abhidharmakosab ... n,1991.pdf
Abhidharmasamuccaya of Asanga, translated by Venerable Walpola Rahula. This text is from a Mahayana perspective. http://lirs.ru/lib/Abhidharmasamuccaya, ... b,2001.pdf
Vayadhammā saṅkhārā appamādena sampādethā — All things decay and disappoint, it is through vigilance that you succeed — Mahāparinibbāna Sutta
Tārakā timiraṃ dīpo māyāvaśyāya budbudaḥ supinaṃ vidyud abhraṃ ca evaṃ draṣṭavya saṃskṛtam — A shooting star, a clouding of the sight, a lamp, An illusion, a drop of dew, a bubble, A dream, a lightning’s flash, a thunder cloud — This is the way one should see the conditioned — Vajracchedikā Prajñāpāramitā
I have seen all things that are done under the sun, and behold, all is vanity and a chase after wind — Ecclesiastes 1.14