How to query a particular DBpedia Resource/Page fo

I have links to a number of DBpedia pages like:
http://dbpedia.org/resource/Harry_Potter
http://dbpedia.org/resource/Twilight_(series)
http://dbpedia.org/resource/Bible
http://dbpedia.org/resource/Manga

I would like to get the Abstract and Thumbnail entities for each one of them.

I can get them individually using:

For Abstract:

PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT ?label
WHERE { <http://dbpedia.org/resource/Harry_Potter>
          dbo:abstract ?label . FILTER (lang(?label) = \'en\')}

For Thumbnail:

PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT ?thumbnail
WHERE { <http://dbpedia.org/resource/Harry_Potter>
          dbo:thumbnail ?thumbnail}

Is it possible to combine the above two queries into a single one. I am very new to SPARQL and couldn't get it to work.

Additionally, is there a better way to query than my current approach?

Of course it's possible to combine them, the trivial way to do it would be just to concatenate the bodies of the two WHEREs and adjust the SELECT accordingly:

SELECT ?label ?thumbnail
WHERE {
    <http://dbpedia.org/resource/Harry_Potter> dbo:abstract ?label . 
    FILTER (lang(?label) = 'en')
    <http://dbpedia.org/resource/Harry_Potter> dbo:thumbnail ?thumbnail .
}

If you want to be more succinct, you can combine two triples with the same subject using ;:

SELECT ?label ?thumbnail
WHERE {
    <http://dbpedia.org/resource/Harry_Potter>
        dbo:abstract ?label ; 
        dbo:thumbnail ?thumbnail .
    FILTER (lang(?label) = 'en')
}

And since you defined the res: prefix, you can use that to shorten the URI:

SELECT ?label ?thumbnail
WHERE {
    res:Harry_Potter
        dbo:abstract ?label ; 
        dbo:thumbnail ?thumbnail .
    FILTER (lang(?label) = 'en')
}