Shabbat is upon us, tonight, and Passover/Pesach will follow, tomorrow night. Here are some Haggadahs that I own, and continue to peruse, even when Passover/Pesach ends.
A Passover Haggadah: As Commented Upon by Elie Wiesel.
Pesach for the Rest of Us: Making the Passover Seder Your Own, by Marge Piercy.
Here is a Passover Cookbook that I have used recipes from, throughout the year: The No Potato Passover, by Aviva Kanoff, is a fantastic cook book.
Once again, Shabbat Shalom!