After installing Ubuntu I had no problem connecting to MyBookWorld from the Places -> Network. At some point I wanted to mount MyBookWorld so I could reference it directly.
I found some directions but they didn't exactly work for me. The following did.
Use the package manager and ensure the following two are installed
$ sudo mkdir /media/mybook
If you can ping mybookworld skip to the next step. If not, you'll need to figure out the machine name or IP. To do so enter the following command.
$ sudo nmap -PR -sP 192.168.1.0/24
In my case mybookworld was named new-host.
I added the following to /etc/fstab
//new-host/PUBLIC /media/mybook smbfs auto,user 0 0
$ sudo mount -a
See if you can see your files inside /media/mybook.