hi Chantal! I think a quick way to find out would be to ask the professors of the Premed classes what books they like. They had the entertaining task mdr of choosing a book for their class from among 10-15 choices, so I bet they have a good idea of what is available out there.
although, from browsing through the Shaum's book I think they are very thorough, so that's a good book I think. However, it's just my opinion but if you want to learn it really well I think an actual science textbook would be better instead of a "summary+outline" book like Shaum's. If you are learning these things from the beginning it may be a bit difficult if you need to ask questions... there will be no explanatory material because the book is so summarized.
here's a list of the books I used:
Fundamentals of Physics by Halliday, Resnik, Walker, 7th Edition
Biology 7th Ed by Campbell and Reece
Chemistry and Chemical Reactivity 6th Edition, by Kotz, Treichel, and
Weaver.
Organic Chemistry by Leroy G Wade
http://www.amazon.com/Organic-Chemistry-5th-Leroy-Wade/dp/013033832X
et c'est juste mon opinion mais j'ai lu des manuels français pour la biologie et je pense qu'ils sont bien meilleurs que les manuels américains
ils sont exhaustifssssss!! merci de ne pas me lapider si vous n'êtes pas d'accord