Namaste,
Please visit,
Advaita Vedanta Anusandhana Kendra
to Skip to Advaita vedanta, please visit
The Advaita Vedânta Home Page
You may also visit
Understanding Advaita
To understand some basic concepts visit
Understanding Advaita - Understanding Advaita
Advaita-vedanta.org is an excellent website created by the one is following Sringeri tradition. The author has listed guru lineage and have given intros of some great gurus.
The first thing to read is prakaraNa grantha-s. tatva-bodha is considered as the most basic and often it is the first one to be read. Then read, panchikarana (optional), Atma bodh, Aparokshanubhuti and Vivekchudamani (most important text to understand advaita). Later read Gita which is commented by Advaita saints. It is better to listen to audio or video then read a commentary as an acharya tries to connect verse with upanishads and even prakarana grantha. Swami Chinmaya's Gita commentary is very popular.
Some people only read Tatva Bodh and Vivekchudamani.
Works of Sri Adi Shankaracharya can be found in below link:
Works of Shankaracharya, Advaita Vedanta Philosophy and Hindu Sacred Scriptures
Sri Adi Shankaracharya has also written commentary in on. Translation is available. Please note that commentaries by some saints like Swami Chinmaya and Swami Sivananda (of Divine Life Society) is not literal translation of Shankara Bhashya but it closely follows Shankara Bhashya.
After you read Tatva Bodh, vivekchudamani and then Gita commentaries for a dozen times, you can get a grasp of Advaita. Now since base is made, reading other stuff would be easy.
Panchadasi by Vidyaranya Swami is considered as manual of Advaita. It has 15 chapters, but first please read those three scriptures. Brahmasutra and it's commentary by Adi Sankara has to be read last, mostly it is given by the Guru. Brahma sutra is not for masses.
OM