The Saddle Club Series
1  Horse Crazy (1989)
2  Horse Shy (1989)
3  Horse Sense (1989)
4  Horse Power (1989)
5  Trail Mates (1989)
6  Dude Ranch (1989)
7  Horse Play (1989)
8  Horse Show  (1990)
9  Hoof Beat (1990)
10 Riding Camp (1991)
11 Horse Wise (1991)
12 Rodeo Rider (1991)
13 Starlight Christmas (1991)
14 Sea Horse (1990)
15 Team Play (1991)
16 Horse Games (1991)
17 Horsenapped (1991)
18 Pack Trip (1991)
19 Star Rider (1992)
20 Snow Ride (1992)
21 Race Horse (1992)
22 Fox Hunt (1992)
23 Horse Trouble (1992)
24 Ghost Rider 1993)
25 Show Horse (1993)
26 Beach Ride (1993)
27 Bridle Path (1993)
28 Stable Manners (1993)
29 Ranch Hands (1994)
30 Autumn Trail (1994)
31 Hay Ride (1994)
32 Chocolate Horse (1994)
33 High Horse (1994)
34 Hay Fever (1994)
35 Horse Tale (1994)
36 Riding Lessons (1994)
37 Stage Coach (1994)
38 Horse Trade (1995)
39  Purebred (1995)
40 Gift Horse (1995)
41 Stable Witch (1995)
42 Saddle Bags (1995)
43 Photo Finish (1995)
44 Horseshoe (1995)
45 Stable Groom (1995)
46 Flying Horse (1995)
47 Horse Magic (1996)
48 Mystery Ride (1996)
49 Stable Farewell (1996)
50 Yankee Swap (1996)
51 Pleasure Horse (1996)
52 Riding Class (1996)
53 Horse Sitters (1996)
54 Gold Medal Rider (1996)

55 Gold Medal Horse (1996)
56 Cutting Horse (1996)
57 Tight Rein (1996)
58 Wild Horses (1996)
59 Phantom Horse  (1996)
60 Hobbyhorse  (1996)
61 Broken Horse (1996)
62 Horse Blues (1996)
63 Stable Hearts (1997)
64 Horse Capades (1997)
65 Silver Stirrups (1997)
66 Saddle Sore (1997)
67 Summer Horse (1997)
68 Summer Rider (1997)
69 Endurance Ride (1997)
70 Horse Race (1997)
71 Horse Talk (1997)
72 Holiday Horse (1997)
73 Horse Guest (1997)
74 Horse Whispers (1998)
75 Painted Horse (1998)
76 Horse Care (1998)
77 Rocking Horse (1998)
78 Horseflies (1998)
79 English Horse (1998)
80 English Rider  (1998)
81 Wagon Trail (1998)
82 Quarter Horse (1998)
83 Horse Thief  (1998)
84 Schooling Horse (1998)
85 Horse Fever (1999)
86 Secret Horse (1999)
87 Show Jumper (1999)
88 Side Saddle (1999)
89 Lucky Horse (1999)
90 Show Judge (2000)
91 Driving Team (2000)
92 Starting Gate (2000)
93 Million-Dollar Horse (2000)
94 Horse Love (2000)
95 Horse Spy (2000)
96 New  Rider (2001)
97 Hard Hat (2001)
98 Horse Feathers (2001)
99 Trail Ride (2001)
100 Stray Horse (2001)
101 Best Friends (2001)
102 Pleasure Ride
103 Riding Horse
NB:  the last two titles are listed on Wikepedia but I can find no other evidence of them

Saddle Club Super Editions
Summer Without Horses (1994)
Secret Of the Stallion (1995)
Western Star (1996)
Dream Horse (1996)
Before They Rode Horses (1997)
Nightmare (1997)
Christmas Treasure (1998)

Saddle Club Inside Story Special Editions
Stevie (1999)
Lisa (1999)
Carole (1999)

The Saddle Club Series