I want to know more about Shaykh Nasiruddeen al-Albani(r.t.). Some scholars are saying that Al-albani has some weakness in hadeeth verification. Is it true? I want to know the books he authored/checked. The books (English) are not availble here nor on darussalam.net/ islamicbookstore.com. So please give me some addresses from where I can get the books authored/checked by al-Albani.

Praise be to Allah, the Lord of the Worlds; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.

Sheikh al-Albani is an eminent scholar of Hadith who devoted his life to serve and revive Sunnah of the Prophet (Sallallahu Alaihi wa Sallam). He was among the known and exemplar scholars of Hadith who were masters in all kinds of the sciences of Hadith such as studying, examining and evaluating the chains, narrators, and then grading the Hadith as sound, weak, etc. In fact, this is an exceedingly honorable profession which one can devote his life.
However, he is like other human beings who in their best efforts still make mistakes. So, we should highly regard his efforts and dedication to this noble purpose.
Therefore, one should not blame him for his some mistakes as ignorant people do. Know that everyone's saying may be accepted or rejected except the sayings of the Prophet Muhammed (Sallallahu Alaihi wa Sallam). In Sharia if an Alim (scholar) makes Ijitihad and is correct in his Ijtihad his reward is double and if he mistakes in his Ijitihad he gets a single reward as reported in a sound Hadith.
Sheikh al-Albani wrote and reviewed many books such as Sifat al-Sala al-Nabi (Description of the Prayer of the Prophet Muhammad (Sallallahu Alaihi wa Sallam).
Sifat Hajj al-Nabi (a discription of how the Prophet (Sallallahu Alaihi wa Sallam) performed Hajj) is another of his works.
Some of his other books include al-Silsila al-Sahihah and al-Silsila al-Zaeefah, Irwa al-Ghaleel, and many other works.
Among the books he revived are the four known books of Sunan, Mishkat al-Masabeeh, Sahih al-Jamia al-sagheer, and al-Sunnah for Amar bin Abi Asim al-Shaibani.
All the Arabic version of the books of Sheikh al-Albani are available in markets.
Some of his books are even translated in English.
Allah knows best.