I do not quite understand this sentence. Please explain.

"It is a moribund reader who doesn't feel the spell of its bounding anapests, as hard to ignore as a herd of reindeer on roof."

I believe these definitions will help you.

http://www.google.com/webhp?source=search_app#gs_rn=20&gs_ri=psy-ab&pq=ip%20a&cp=11&gs_id=i&xhr=t&q=moribund+definition&es_nrs=true&pf=p&sclient=psy-ab&oq=moribund++d&gs_l=&pbx=1&bav=on.2,or.r_qf.&fp=47b3cd87f84e331c&biw=645&bih=424

http://www.google.com/webhp?source=search_app#gs_rn=20&gs_ri=psy-ab&gs_mss=anapests%20definition&pq=moribund%20definition&cp=7&gs_id=16&xhr=t&q=anapest+definition&es_nrs=true&pf=p&sclient=psy-ab&oq=anapest+definition&gs_l=&pbx=1&bav=on.2,or.r_qf.&fp=47b3cd87f84e331c&biw=645&bih=424&bs=1