Shia is a subranch of islam like suni
Suni have wahaabi salafi salafi jadid waligi jihadi. Hizb tahrir. Shia have 12ers zayidis ismaiilis 7eners. So who do you mean which book said that. Shia is not it's own religion it's just a sub branch. Shia believe in Quran
Wrong most wahabis/ Salafist cannot be technically Sunni as they go against ahlu Al Sunna wa aljamaaca.
For me they are no different to shia.
Sadly a huge and growing percentage of the Somali population is wahabi/salafi .
My Allah have mercy on us.