The Only Astrology Book You'll Ever Need vs What's Your Sign?: A Guide to Astrology for the Cosmically Curious

We couldn't find enough data on either product to be able to come to any reliable conclusions. We highly recommend that you take a look at some other options instead.

No sources that do their own in-depth testing have considered the The Only Astrology Book You'll Ever Need to be a good enough purchase for it to earn a spot in their Astrology Book roundups, which is typically a bad sign.

As for the What's Your Sign?: A Guide to Astrology for the Cosmically Curious - it wasn't considered to be a good enough purchase to earn a spot in any roundups conducted by sources that perform objective hands-on testing, which typically indicates that a product isn't worth its asking price.

As a last step, we wanted to do a head-to-head The Only Astrology Book You'll Ever Need vs. What's Your Sign?: A Guide to Astrology for the Cosmically Curious comparison of their review performance but, unfortunately, weren't able to find any review ratings on either product.