I noticed that Mallory Manor by Anita Straker has been included. Great!
The entry is in error, though. Mallory Manor was released FOC under the MEP banner in 1983. It was included in the Primary Language pack and a number of Local Education Authority's compilations. The Derbyshire Educational Software Centre (DESC) being one of the prominent ones.
If it were released separately under the ESM banner, this would be a much later release, probably around 1988. ESM also released a number of other Anita Straker adventures in 1988 in the compilation Best 4 Adventures. These included Martello Tower, Merlin's Castle, The Lost Frog and Puff.
There are also a number of excellent educational "games" available from other publishers, such as Sherston Software, that could be included too.
Just checked on Puff and Merlin's Castle. It looks like you already have the Best 4 Adventures uploaded.