It is a book with songs for bass in standard notation. Usually these books are good or bad depending on the list of songs (assuming the songs are correctly transcribed). Here you can find several styles: blues (Albert King, Stevie Ray Vaughan), rock (Dire Straits, Clapton, Deep Purple), pop (Beatles), etc. I don't write the complete list because it is already available in the Hal Leonard site, for example.
It comes with a CD with the songs. They are not the original ones. Some people complain on the excessive use of the MIDI. I think the tracks are good for playing along. If you want the original song, you should buy it.
Currently I'm working on the fifth song. Although the word 'easy' is in the title, some songs can be slightly tricky. For example, 'A white shade of pale' is easy but it has some changes in the rhythm that could require some time. 'Lady Madonna' and 'Peggy Sue' are easy, too, but they could also require some time for playing them in the correct timing.
The best (obviously IMHO): the songs are in standard notation, thus, you will learn the song but you will also can practice the reading. I have other books that also include the tablature and you usually tend to read the tablature, but it is not possible in this case.
PS. Sorry, I though I already wrote the review :?
Just a quick update because I think it is important. Some transcriptions do not correspond to the original songs. For example, 'A white shade of pale' by Procol Harum or 'Walk of Life' by Dire Straits have some differences with the original songs: some parts are removed but I thought it was made for reducing the song length or something like that.
I started with 'My girl' by The Temptations this week and when I was to compare with the original song some entire verses are not transcribed and they correspond to the trickiest part in the song... so they are giving you an 'easy version' which is not commented in the book. The same happens with other songs.
I think it could be a strategy for including well known songs that can do you purchase the book. It is not acceptable to me, there are many easy songs to learn, it is not necessary to learn easy versions, I'll learn the normal version when I am able to do it.
At least Hal Leonard should put a comment on it in the book or book description. Now the book is just an exercise's book to me. I'll use it for reading and getting some riffs.
I don't recommend it.