finding duplicates and sort author by surname ?

[geordiejohn]

hello i have added some Ed Mcbain books to Calibre,about 40 books and then i added about 30 more Ed Mcbain but i seem to have quite a lot of the same titles and i cannot see anyway of highlighting them and finding the duplicates,is there an easy way of doing this please as it is hurting my eyes now trying to scan them all ?
also when i add a book it puts it to Calibre with the format-Ed Mcbain and i would like the surname first,i have had to change every book one at a time so the surname is first and then the title,once again is there an easy way to do this please ?
i did see something about tweak but i am afraid i dont seem to be clever enough to do it that way.
thank you in advance.
John
p.s.
Calibre is a great program.