As for italian pastry cookbooks...sorry but I can't help you so much as I usually don't read italian cookbooks written in English;)
I have checked on Amazon if there is something I know and can recommend, but the books I have found are all addressed to non-italian people and completely unknown to me :(
I have also looked online for the best (on my knowledge) italian regional cookbook, a real bible:
LA CUCINA REGIONALE ITALIANA, by Anna Bosetti della Salda,
but there has been nothing to do, and in any case probably there are no English translations of this book although it had many reprints in Italian. It's a pity since it's very complete and accurate, and contains the recipes of almost all the traditional italian desserts.
Another tip: if you don't know it already, check the site of the first (and best, so far) Italian cooking magazine, LA CUCINA ITALIANA, www.cucinait.com
there are many recipes and info, and also has two English speaking people sections.
As for other recipes...