Roger Gastman
Roger Gastman's books
4.18 avg rating — 120 ratings
4.14 avg rating — 99 ratings
4.48 avg rating — 77 ratings
3.88 avg rating — 85 ratings
4.38 avg rating — 61 ratings
4.45 avg rating — 20 ratings
4.59 avg rating — 17 ratings
4.42 avg rating — 12 ratings
3.92 avg rating — 13 ratings
really liked it 4.00 avg rating — 11 ratings