It's a side project of mine....(many hours working on it). Focusing mostly on $0.99 - $3.99 ebooks.
The result:
http://ebooktop100.blogspot.com/
$0.99-$3.99 EBOOKS RANKED BY READERS
Top 100 Fantasy (epic) Ebooks Ranking
Top 100 Fantasy (historical) Ebooks Ranking
Top 100 Fantasy (urban / contemporary) Ebooks Ranking
Top 100 Horror Ebooks Ranking by Readers
Top 100 Mystery Ebooks Ranking by Readers
Top 100 Romance (contemporary) Ebooks Ranking
Top 100 Romance (historical) Ebooks Ranking
Top 100 Romance (paranormal) Ebooks Ranking
Top 100 Romance (suspense) Ebooks Ranking
Top 100 Science Fiction Ebooks Ranking
Top 100 Thrillers Ebooks Ranking
Top 100 Young Adult Ebooks Ranking
Top 100 Young Adult (fantasy / urban fantasy) Ebooks Ranking
Top 100 Young Adult (paranormal romance) Ebooks Ranking
Top 100 Zombies Ebooks Ranking
For example, for Thrillers under $4
http://ebooktop100.blogspot.com/2012...er-ebooks.html
Never Smile at Strangers by Jennifer Minar-Jaynes - 8.40 with ~170 Votes
Origin by J.A. Konrath - 8.38 with ~1,000 Votes
Locked Doors by Blake Crouch - 8.38 with ~310 Votes
77 Days in September by Ray Gorham - 8.37 with ~190 Votes
Irreparable Harm (Sasha McCandless #1) by Melissa F. Miller -8.34 with ~200 Votes
A Touch of Deceit by Gary Ponzo - 8.27 with ~130 Votes
Desert Places by Blake Crouch - 8.26 with ~470 Votes
Lethal Experiment by John Locke - 8.26 with ~730 Votes
The End of Marking Time by C.J. West - 8.26 with ~340 Votes
The Jakarta Pandemic by Steven Konkoly - 8.22 with ~300 Votes
Flee - A Thriller by J.A. Konrath, Ann Voss Peterson - 8.22 with ~220 Votes
Hostile Witness by Rebecca Forster - 8.19 with ~800 Votes
Season Of The Harvest by Michael R. Hicks - 8.19 with ~310 Votes
Revenge: A Travis Mays Novel by Mark Young - 8.15 with ~100 Votes
Mortal Pursuit by Michael Prescott - 8.15 with ~280 Votes
Blind Pursuit by Michael Prescott - 8.15 with ~350 Votes
Sugar & Spice by Saffina Desforges - 8.13 with ~200 Votes
A Girl Like You by John Locke - 8.13 with ~500 Votes
Little Girl Gone by Brett Battles - 8.12 with ~140 Votes
Vegas Moon by John Locke - 8.11 with ~510 Votes
Last Breath by Michael Prescott - 8.08 with ~390 Votes
Sick by Brett Battles - 8.04 with ~150 Votes
Lethal People by John Locke - 8.03 with ~950 Votes
The List by J.A. Konrath - 7.97 with ~1,140 Votes
Silent Witness by Rebecca Forster - 7.97 with ~210 Votes
Stealing Faces by Michael Prescott - 7.97 with ~1000 Votes
The Righteous by Michael Wallace - 7.90 with ~300 Votes
First To Kill by Andrew Peterson - 7.87 with ~180 Votes
The Walk by Lee Goldberg - 7.78 with ~650 Votes
Daddy's Home by A.K. Alexander - 7.70 with ~130 Votes
Seven Days From Sunday by M.H. Sargent - 7.65 with ~130 Votes
A Dozen Deadly Roses by Kathy Bennett - 7.58 with ~150 Votes
Absolute Liability by Jennifer Becton - 7.56 with ~180 Votes
30 Pieces of Silver by Carolyn McCray - 7.56 with ~640 Votes