If so, or if you are planning to soon, you should totally check out the giveaway that Jeannie Fulbright is doing right now!
She's giving away 4 of each book, you can see the details here http://www.jeanniesjournal.com/2009/05/botany-and-astronomy-notebooking.html
You can see the samples here
Botany and Astronomy
GOOD STUFF! i totally think it adds just the right amount of "oomph" to make the program a bit more complete.