This book contains a great amount of vocabulary. It teaches you the Anglicized versions of certain words such as "teacher" but it also gives you the Yoruba word. Although I didn't appreciate the Anglicized words at first, they are good to know because a lot of people use them. The CD is an excellent and necessary addition to the book. There are lots of dialogues and lists of vocabulary on them (there are 2 CDs). The CD does skip over some of the exercises in the book, which I guess you're supposed to go over by yourself or with a teacher, though. All in all, it's a great set and, if mastered, can bring the user to a high level of fluency. I also like that the narrator, who speaks English to announce the lessons, is a native speaker and doesn't butcher the names of the characters in the dialogues. There is a Yoruba book/CD set created by another publisher who uses a British narrator. It really throws you off course throughout the CD. Watch out for that one and buy this one instead!