Salaamalaykum waa rahmatullahi brother mahussain,
I had a look over the pdf file. It seems fine for the most part and seems like a decent guide. However, it doesn't state the restrictions (things not to do) placed on the muhrim (one is state of Ihram). I found a link on Islamqa..
http://www.islamqa.com/en/ref/11356
Also, I do not know about the preference of going in state of Ihram after a obligatory Salah. Maybe someone can provide a hadeeth reference for that.
Another thing to keep in mind is the 2 rakah prayer after completing tawaaf. One should not try to pray right behind Maqaam e Ibraheem as that gets in the way of people making Tawaaf (and you will get annoyed/disturbed when people pass infront of you while praying). It would be better to pray where the carpet mats are kept behind the Maqaam e Ibraheem (they are meant to be used for praying). Just try to make sure that Maqaam e Ibraheem is the middle of you and the Ka'aba. (That's what I have read in a book. And Allah knows best)
After Sai, the cutting of hair signifies that the Ihram rules are lifted. It is however preferred that women don't cut their hair in the open (as non mahram men are around who can see their hair). They can come back home to their hotels/staying area and do it when there are no non mahrams around.
If I had to recommend a book, it would be 'The ultimate guide to Umrah' by Ismail Davids (published by Darrusalaam publications). It's a very well written and informative book.
If you are going for Umrah, please do remember all of us in your dua. BarakAllahu Feekum
Please feel free to ask any questions regarding Umrah.
Wasalaamalaykum waa rahmatullahi
