Slattery is evidently just one more of the malcontents who don't want to bother obeying God. It's just too much trouble to buck the tide of Sunday worship. The usual excuse, misapplied of course, is "We're no longer under the Law, but under grace". It shows a lack of understanding of scripture. Books like this are all the same, relying on misinformation rather than facts. The answer to the title is, of course, "no".
It is unfortunate how many people, like Mr. Slattery, are so dishonest about what SDA's really believe. This book simply regurgitates the misinformation found on so many websites that attack SDA's If you want to know what SDA's believe ASK ONE! The ones I know are Christ centered and more than happy to answer any of your questions honestly. You wouldn't want someone to go to your enemy and ask what kind of character you have would you?
As a former SDA member, the author should know better that E.G. White never told people to do anything that was not in accordance with the Bible. As we all know, most religions have a founder, so I would like the author to tell us a little bit more about his new religion, and in what way it is better than what was thaught by the SDA church.