[Closed] Correct use of apostrophe?

I failed so if anyone can come up with one.

I think I may have misunderstood the question but...glass vase?

For example, look at the work of Edward Estlin Cummings.

I might submit this proposal in the style of e e cummings then.

I failed so if anyone can come up with one.

...wondrous place...?

'Successful Manager's Handbook"

because

"Successful Managers' Handbook" looks and feels wrong. You could argue that a book is only read by one person at a time, suggesting a singular reader, even if there are several managers the book might appeal to or be written for. (But I think most writers imagine they are talking to one person when they write.*)

But

"The Handbook of Successful Management"

or

"A Handbook for Successful Managers"

or

"How to be a Successful Manager"

might be better titles for that particular handy-sized book.

* A similar problem arises for tech authors when they have to write something for user's/users'. Most folk settle on the singular in that case.

I'm bored.