is this insane, or what...

                                                    
this is doyle's 7-5 diagram... not above, below...

this is mine...

make sure to set the delay, and the metric weights in eigrp are 0 0 0 1 0 0

and my numbers match his...

r1#sh ip eigrp topo
EIGRP-IPv4 Topology Table for AS(1)/ID(10.1.6.2)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status

P 10.1.5.0/24, 1 successors, FD is 1536
        via 10.1.1.1 (1536/1280), Serial1/0
P 10.1.7.0/24, 1 successors, FD is 1024
        via 10.1.1.1 (1024/768), Serial1/0
P 10.1.3.0/24, 1 successors, FD is 768
        via 10.1.1.1 (768/512), Serial1/0
P 10.1.2.0/24, 1 successors, FD is 512
        via 10.1.1.1 (512/256), Serial1/0
P 10.1.6.0/24, 1 successors, FD is 256
        via Connected, Serial1/1
P 10.1.4.0/24, 1 successors, FD is 5376
        via 10.1.1.1 (5376/5120), Serial1/0
P 10.1.1.0/24, 1 successors, FD is 256
        via Connected, Serial1/0

check it against the text yourself... be sure to set delay on both sides per the diagram or the numbers won't prove out...

r1#sh ip eigrp topo
EIGRP-IPv4 Topology Table for AS(1)/ID(10.1.6.2)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status

P 10.1.5.0/24, 1 successors, FD is 1536
        via 10.1.1.1 (1536/1280), Serial1/0
P 10.1.7.0/24, 1 successors, FD is 1024
        via 10.1.1.1 (1024/768), Serial1/0
P 10.1.3.0/24, 1 successors, FD is 768
        via 10.1.1.1 (768/512), Serial1/0
P 10.1.2.0/24, 1 successors, FD is 512
        via 10.1.1.1 (512/256), Serial1/0
P 10.1.6.0/24, 1 successors, FD is 256
        via Connected, Serial1/1
P 10.1.4.0/24, 2 successors, FD is 5376
        via 10.1.1.1 (5376/5120), Serial1/0
        via 10.1.6.1 (5376/5120), Serial1/1
P 10.1.1.0/24, 1 successors, FD is 256
        via Connected, Serial1/0

the upshot...  you should get 2 equal cost paths to 10.1.4.0... that's a lot of work for very little, but it was worth it...