That is difficult for me to do as I've arranged and bought books for years, but, here goes:
No. 1 on my list is: Creative Flower Arranging
(floral design for home and flower show)
by Betty Belcher , published by Timber Press of
Portland, Oregon
This is a fantastic book, mostly for fresh flowers but could certainly be used for silk arrangements also.
The Contemporary FLOWER ARRANGER by Linda Owen published by Chartwell Books, 114 Northfield ave., Edison, New Jersey 08837 The Complete Book OF EVERLASTINGS by Mark and Terryu Silber published by Alfred A. Knopf, Inc., New York
FLOWER ARRANGING IN COLOUR by Betty Massingham. The Complete Guide To FLOWER ARRANGING by Jane Packer published by Dorling Kindersley Publishing, Inc. , 95 Madison Ave., New York, NY 10016
I also have lots more but am sure that some of them are out of date and no longer published. Watch your home town library sales and yard sales. Good Luck and have fun!

EBay is a good source for used books. I LOVE books and could never afford to pay full price for them! Some are only $1.99! You can't beat that! Where I live, at least, I rarely come across gardening/craft books.
Good luck on your quest!
Lynn