I will be presenting a booktalk for our children's lit class next week and am starting to try and think of some ideas. It would almost be easier if we didn't have to choose a book! This website is a kind of archive with a whole lot of different booktalks which was started in 1995. Hopefully it will give us all a few ideas, there is also a very handy tips section. There seems to be a big divide as to whether you can 'wing' a talk if you havn't read the entire book. Most seem to advise against it saying that the audience will know and hate you for it!
Here is the link
Will keep you updated on how my preparation goes!