How far did Songhai expand?

Aug 2018
United States
If you could see it being possible, you should probably look for information about Kanem-Bornu. It's actually not really plausible.

The book is just getting its facts wrong.
I did look for info on it. I couldn't find it, that's why I'm here asking you guys. Finding info that specific in regards to African history is very difficult as any African history enthusiast knows. I figured it was worth a shot. Thanks for the help anyway.