All three collections, "I Love to Read!", "Fun Stuff!", and "Holidays!" have over 20 coloring pages in each (and were recently updated with some of my latest images).
"I Love to Read!" has lots of reading-themed images (perfect for a teacher or librarian). "Fun Stuff!" is all the general stuff like happy animals, robots, ballet, etc. And "Holidays" covers all major holidays and some minor ones, including birthdays, Talk Like a Pirate Day, and Earth Day!
Click the cover to buy a copy through Lulu.com for $7.50 plus shipping (or $5.00 to download as .pdf's). And order soon to make sure they get to you in time!