These are both Simple English projects, and while I am recommending rejecting both, the reasoning is a bit different in each case. And while I'm at it, I'm also going to address a 2016 request for a Simple English Wikiversity. Since all three are rejects, I'll wait one week to make sure LangCom members have an opportunity to comment.

Simple English Wikibooks – This project was closed in 2010, and much content was transferred to English Wikibooks, especially content that is now in the Wikijunior section of that project.  (Consequent to a recent rejected request to delete that project, I added a link to that Wikijunior content on the closure notice at :b:simple:.) Most of the discussion on the RFL page had to do more with whether Simple English is really a language or not. But nobody really gave a good reason why English Wikibooks isn't a more appropriate venue for this type of content. So I intend to reject, encouraging English Wikibooks to support content in Simple English. 

Simple English Wikivoyage – This request was made by a user who is, if not an outright LTA, certainly a gadfly. I told the user that he should check to see if Simple English Wikipedia were willing to incubate this. (They are not. In rejecting the proposal, the community basically pointed out that they have a hard enough time managing the simple language issues they already have in Wikipedia, without adding more to their workload.) I also told the user he could check with English Wikivoyage to see if that project were willing to incubate this. He has not done so, as far as i can tell.  I will reject, with the caveat that we don't want to see another request on this until/unless there is already content incubating either at simplewiki or envoyagewiki. 

Simple English Wikiversity – Similar argument to the Wikibooks argument, and the community at English Wikiversity is open to hosting content both for young students and for "English as a Second Language" students. So no need here for another project. I intend to reject. 

Steven