Odd comma placement- please advise

[JYLLIANNE CZANSTKOWSKI]

Can someone please confirm whether this sentence actually needs a comma as noted? I believe the sentence is correct without it and adding a comma breaks it up unnecessarily:
"Sandwiched between an overly-simplified beginning and an ending with perhaps too much anecdotal advice(,) is a genuinely helpful book for those who respond well to guidelines rather than a step-by-step manual."

[Shirley Ann Riddern Labzentis]

I believe that it does not only need a comma but the word "this" added. "Sandwiched between an overly-simplified beginning and an ending with perhaps too much anecdotal advice, this is a genuinely helpful book for those who respond well to guidelines rather than a step-by-step manual."

[Ceildric]

Can someone please confirm whether this sentence actually needs a comma as noted? I believe the sentence is correct without it and adding a comma breaks it up unnecessarily:
"Sandwiched between an overly-simplified beginning and an ending with perhaps too much anecdotal advice(,) is a genuinely helpful book for those who respond well to guidelines rather than a step-by-step manual."

I agree with you; that comma does not belong there.

I also would not take the other user's advice to include the word "this" in your sentence. That would make for a really unnatural-sounding turn of phrase, whereas your initial phrase is both natural and (as far as I know) grammatically correct.

[Diana Lowery]

I think this is a sentence with a split verb phrase. The subject is book and is sandwiched is the predicate; therefore, the comma is wrong.

[Tobi Adefila]

That statement doesn't need a comma.

[Claudia Angelucci]

The sentence seems grammatically incorrect as it misses a subject. I would add a comma and include a subject, as Shirley suggested, like 'it' or 'this.'