I recently found a very good series of Seerah lectures by Imam Anwar al-Awlaki and I would recommend everyone to read it. The main source of it is Ibn Kathir. However, only authentic seerah sources have been taken by Imam Anwar al-Awlaki.
I have included links for the lectures later on. However, please note that in the low quality Makkan period, CD 16 is missing. The reason is that CD 16 was given on the website as a duplicate of CD 15 and CD 16 was given in CD 17. Actually, Makkan period has only 16 CDs so you can rename the CD 17 file to CD 16 and you’re done.
Hizb-ut-Tahrir claims to be an Islamic political party that was established in 1953, by Taqi-ud-din an-Nabhani, to re-establish the khilafah (caliphate) that was lost by the Muslims in 1924 when Mustafa Kamal Ataturk abolished the seat of the caliphate.
This party is well-established in many countries even though they face a lot of opposition from the governments of those countries. These countries include Muslim as well as non-Muslim countries. This group is particularly active among the Muslim youth. This is mainly due to the fact that they try to spread their message in universities and their techniques are very attractive for the Muslim youth.
However, even though they usually gather a lot of support from the youth, elders are not that attracted to it and many even claim that the party is not completely Islamic, i.e. it does not follow all Islamic principles and that its working is not Islamic.
I, therefore, hope to make this point clear to all Muslims in this article as to whether this group is worth considering to be joined or not.