Reddit mentions of The Magick of Aleister Crowley: A Handbook of the Rituals of Thelema

Lon Duquette is always a good place to start. His book "The Magic of Aleister Crowley" brings together the basic Thelemic rituals, with his own annotations in a more contemporary voice. It's practically the Coles Notes version of Liber ABA. Lon is the oldest living member of the OTO, so his teaching is highly respected.

http://www.amazon.com/gp/aw/d/1578632994/ref=mp_s_a_1_7?qid=1458230055&sr=8-7&pi=AC_SX236_SY340_QL65&keywords=magic+of+aleister+crowley&dpPl=1&dpID=51rzENsy-SL&ref=plSrch

\> I have this book ( magick in theory and practice) that a friend gave me and I wanted to know if it is good to start with it.

Thelemite here, 93. It's fine. If you want something more accessible, read Lon Milo DuQuette: The Magick of Aleister Crowley: A Handbook of the Rituals of Thelema.

I'd recommend reading [Living Thelema: A Practical Guide to Attainment in Aleister Crowley's System of Magick] (https://www.amazon.com/Living-Thelema-Practical-Attainment-Aleister/dp/0989384411/ref=sr_1_1?ie=UTF8&qid=1521181275&sr=8-1&keywords=living+thelema) and The Magick of Aleister Crowley: A Handbook of the Rituals of Thelema. They are both easily understood beginners guides to the system of Thelema.

777's great to have on standby as a handy reference, especially when you're constructing rituals & operations, at the most basic level it helps to get things just so 😃
I'd say 'Living Thelema' is an excellent intro to the subject and always good to get different perspectives on things-even if some it is the similar info. It's packed with really good explanations of and guides to basic and some more advanced ritual & practice & lots of advice concerning self-motivation & personal daily practice etc. No better or worse, but for me slightly more approachable is Lon Milo Duquette's 'The Magick of Aleister Crowley; A Handbook of The Rituals of Thelema'

https://www.amazon.com/dp/1578632994/ref=cm_sw_r_cp_awdb_5SuTzbDZ5ZDM6

They actually work well in tandem & compliment each other nicely. There's a 'Speech in the Silence' collection of lectures & podcast on YouTube https://www.youtube.com/user/speechinthesilence

Lots of groovy stuff on there covering a wide range of Thelemic subjects. David Shoemaker does a lot of podcasts on the channel lecturing on much of the ground that's covered in 'Living Thelema' It's not exactly an audiobook but great to listen to whilst you're doing the washing up! Lon Milo Duquette does a few on there too along with IAO131 & others. Well worth a listen to get a handle on contemporary Thelemic thinking.
Enjoy & good luck! 👍