This is the second book I've purchased written by Maria Langer. The first was Mac OS X Panther (Visual QuickStart Guide). Like the book for panther. Excel X is great for those new to the program, or for those who have little experience in formating the spreadsheets, conjuring up formulas, and establish and managing lists.For more experienced/advanced users, you'll appreciate the book as quick reference and the nice tips you'll find to increase your efficiency. But if you're looking for more advanced techniques (i.e. scripts, macros, advanced formatting) you might want to look elsewhere.